MONTESSORI METHOD

The Montessori Method of education that it obtained from its experience, has been successfully applied to all children and is very popular in many parts of the world. Regardless of the criticism of his method in the early 1930s-1940s, has been applied and obtained a revival.

In 1907 he established the first Montessori Children's House, 'Casa dei Bambini', in Rome. Since 1913, there was intense interest in her method in North America, interest later waned. (Nancy McCormick Rambusch revived the method in America, setting the American Montessori Society (American Montessori Society) in 1960.) Montessori was exiled by Mussolini to India during the Second World War, largely because he refused to compromise his principles and turning children into young soldiers. Montessori lived out the rest of his life in the Netherlands, a country which is the headquarters of the AMI, or Association Montessori Internationale. Died in Noordwijk aan Zee. Her son Mario headed the A.M.I. until his death in 1982.

Numerical Mechanisms and Children’s Concept of Numbers

Numerosity and Ordinality of Infants

Children, just like animals and adults, are quite accurate with very small numbers, and they can compute approximately with larger numbers. Piaget suggested that infants are born with no understanding of numerosity, which is the ability to discriminate arrays of objects on the basis of the quantity of items presented—for example, being aware of that a quantity of two is different than a quantity of three. Early Piaget experiments (Piaget 1942) described infants' lack of numerosity as a poor perception of quantity conservation. However, recent experiments have shown that infants between ages of 4 and 7 ½ months are able to discriminate two items from three items, but not 4 items from 6 items (Starkley et al. 1983). In particular, 7-month old infants were presented with two photographs of two or three items accompanied with two or three drumbeats. The infants looked longer at the photos with the number of items matching the number of drumbeats, indicating intuition of quantities up to 3 or 4 and suggesting at the same time that this ability for numerosity abstraction is neither visually nor auditory based (Geary 1994). Other experiments, conducted independently, showed that 10 to 12-month old infants could discriminate 3 from 4 items and, sometimes, 4 to 5 items (Strauss & Curtis 1981).
Nevertheless, the experimental results mentioned above did not indicate that infants perceived that 2 is more than 1 or 3 is more than 2. That awareness of ordinal relationships between numerosities (ordinality) is developed slowly across small values (up to three or four) in the first 18 months of life (Geary 1994). At this age, infants are sensitive to small changes of small quantities, for example they seem to understand the result of addition 1+1=2 or subtraction 2-1=1. The ability to understand even small quantities (numerosity) from the first months of life therefore indicates that there is an innate mechanism for number sense which can provide the seed for further development of numerical skills and abilities.

Numbers, Number Words and Counting

The notions of numbers and counting dates back to prehistory, and all tribes or societies, however simple, have some system of counting. With the invention of writing, symbols were found to represent the numbers. Different methods of representing numeric symbols were invented, but the most common one was the division in groups of ten. The numeric systems invented vary across time and place, and there is no doubt that the properties of such a system can facilitate or impede the development of children’s mathematical understanding. Chinese (and Asian languages based on ancient Chinese) are organized such that the numerical names are compatible with the traditional 10-base numeration system. So spoken numbers correspond exactly to their written equivalent: 15 is spoken as "ten five" and 57 as "five ten seven." Most European systems of number words are irregular up to 100. For example in French, 92 is said as "four twenty twelve," corresponding to 4*20 + 12. The more complicated the number word system is, the harder it is for children to learn the counting sequence. An interesting system is that of the Oksapmin (Saxe 1982), a horticultural society in Papua New Guinea, where counting and numerical representations are mapped onto 27 body parts (Figure 1).

Figure 1: Oksapmin counting system, based on 27 body parts (Saxe 1982).
Linguistic aspects of numeration systems not only can affect the speed of learning the counting sequence, but also influence the children’s understanding of base structure, place value (units, tens, etc.) and associated arithmetical computations. For example, Asian children have a better understanding of the 10-base concept than their first grade American peers. The system of spoken numbers affects the child’s cognitive representation of numbers. The speed at which numbers can be pronounced also has an affect on the child’s memory span for numbers. The ability to keep more number words in short-term memory seems to influence early mathematical skills which require counting, for example in problems of simple addition. Important is that children first learn number words ("one," "two," "three"…), and then couple them with their quantity concepts. How quickly those associations happen vary across different cultures as they are influenced by linguistic factors.

Counting Principles

It should be emphasized that there is no reason to require a child to use conventional count words in the conventional order. It can be safely assumed that there is a need for a set of unique tags to tick off the items in a collection, during the counting process, using these tags in a fixed order. The set of number words meets these criteria, but then so do other sets of tags, like the alphabet. It is noteworthy that many languages have used the alphabet as count word tags, for example, Greek and Hebrew. Tags need not even be verbal. They may be idiosyncratic entities, including short-term memory bins (Gelman and Galistel 1978). In any case, independent of the kind of counting tags, whether they are number words, the alphabet or other child-dependent sequence, five principles govern and define counting. The first three deal with rules of procedure, or how to count; the fourth with the definition of countables or what to count and finally the fifth involves a composite of features of the other four principles. We will mention briefly the five counting principles that are based on the influential work of Gelman and Galistel (Gelman and Galistel 1978):
The one-to-one principle
This principle emphasizes the importance of assigning only one counting tag (number word, alphabet element, or other) to each counted object in the array. For example, the child should never state "one, two, two." To follow that principle, a child has to coordinate two processes, partitioning and tagging. This simply means that every item being counted needs to be transferred from the to-be-counted category o the counted category (partitioning) while a distinct tag must be set aside, not to be used again in the counting sequence (tagging). Children employ many strategies to facilitate the coordination of partitioning and tagging, pointing to the objects and stating at the same time the associated number word is a common one.
The stable-order principle
Counting involves more than the ability to assign arbitrary tags to the items in an array. The counting tags chosen must be arranged in stable (i.e. repeated) order. For example, the child might count three objects stating "one, three, four" and four objects by stating "one, three, four, five."
The cardinal principle
This principle reflects the child’s understanding that the last number word of an array of counted items has a special meaning: it represents the set as a whole and the numerosity of this set of items. It seems likely that the cardinal principle presupposes the one-to-one principle and the stable-order principle and therefore should develop after the child has some experience in selecting distinct tags and applying those tags in a set.
The abstraction principle
The realization of what is counted is reflected in this principle. A child should realize that counting could be applied to heterogeneous items like toys of different kinds, color, or shape and demonstrate skills of counting even actions or sounds! There are indications that many 2 or 3 year olds can count mixed sets of objects.
The order-irrelevance principle
The child has to learn that the order of enumeration (from left to write or right to left) is irrelevant. Consistent use of this principle does not seem to emerge until 4 or 5 years of age (German and Galistel 1978).
Although children at the age of 3 seem to understand the basic principles of how to count, Piaget's experiments indicated that counting proficiency, and mature number sense do not emerge until the age of 8. It seems that the innate, primitive mechanism of number understanding and counting needs constant refinement through practice and experience. Minsky states that younger children possess adequate knowledge about amounts and numbers. However, they lack knowledge about their knowledge or "they have not acquired the checks and balances required to select or override their hordes of agents with different perceptions and priorities." (Minsky 1985).

Early Arithmetical Skills

Starkey (1992) showed that very young children could represent numerical quantities without the use of language. Even more importantly, they could understand that addition increases the numerosity of the set of items, while subtraction does the opposite. Starkey used a box where a child could search for tennis balls without being able to look inside. Children were shown a small set of balls put into the box, and then asked to retrieve that set of balls. An assistant, in anticipation of every child’s retrieval, secretly put balls inside the search box so that their number remained constant. 36 to 42 month-old children were able to perceive numerosities of up to 4. When children were shown an additional placement or removal of 1 to 3 balls and then asked to search for the set of balls, the question was whether they would retrieve the number of balls placed originally, or whether they would search for the number of balls after the addition or subtraction. Nearly all 18-24 month-old children searched for the set of balls after the addition or removal, signifying that they could understand the result of a simple addition or subtraction of up to 4. The above experimental results do not contradict Piaget's experiments that suggest poor number sense and arithmetical efficiency of children until the age of 7: the Starkey experiments did not rely at all on visual cues—or, at least as much as Piaget’s! Moreover, the above experiment did show a deficiency for more complex addition and subtraction problems, at the preverbal stage of children life.
Baroody and Ginsburg (1986) and others suggested that children adapt their already-existing counting skills and knowledge to problems requiring addition and subtraction. Adaptation occurs during the development of verbal counting, after children have learned the number words of their language and the strategies involved depend on each culture’s counting system. This remark is very important if we consider that children recognize and use counting as an addition/subtraction problem-solving strategy before formal education in school. Verbal counting seems to be a very reasonable arithmetical strategy, given that basic nonverbal skills of children appear to be applicable to only small values (Geary 1994).

Arithmetical Development

As the child learns the culture’s number words and associates these words with sets of objects, for example, five with all of the fingers on one hand, the manipulation of quantities larger than those that the child can perceive innately becomes feasible. The basis for children arithmetical development seems to be formed initially through simple counting, using fingers or objects so that the child doesn’t lose track of what it has already counted. Later, after the child has gained some linguistic competence, verbal counting (thinking with number words) shapes the children's mathematical development.
In early preschool years, object counting using manipulatives is common. Children solve simple addition and subtraction problems by counting the whole set (for the case of addition) or the remaining set (in the case of subtraction) of objects. Manipulatives can be our fingers or other body parts, like in the case of the Oksapmin. They help keeping track of what has already been counted and involve special techniques for problem solving. For example, a student can solve "10-3" by raising the fingers of the two hands, folding three and counting the rest. Verbal counting is a more mature technique, where the child uses neither fingers nor objects, but monitors the process using only short-term memory. For example, in order to solve "5+3," he can count mentally "5 6 7 8," and then, using the principle of cardinality, infer that the result is 8.
Counting is an important exercise for children. It helps them explore the relationships between numbers. Reflecting on number ordinality and realizing that smaller numbers are included within bigger numbers helps them modify their problem solving strategies. For example, in order to solve "3+19," they should start counting from 19 and progress to "20 21 22" instead of starting from 3 and progressing to 19, because in the latter case, they would have to count much more, increasing the possibility of errors. This pattern of calculation therefore has its origins in the early counting explorations of every child. Because of its great importance and heavy use, the counting problem-solving strategy is an established, prominent skill even for adults.
Skillful counting as well as gradual understanding of the numerical system improves children's number sense. The structure of the number words plays a significant role, as explained previously. Children with a better number sense are able to decompose numbers into smaller groups, usually around powers of 10 or 5, depending on the kind of the problem, or regroup them later, simplifying their problem solving strategies. Number regrouping and decomposition (derived facts) accelerate problem solving and improve number understanding. Practice and success in arithmetical operations form experience in terms of long term memory storage of basic facts about numbers. Thereinafter, the solution of simple arithmetical problems involves direct memory retrieval of "hard-wired" facts (or according to Minsky’s theory, K-lines): for example, to solve "5+3," the child after a certain age will answer directly 8 without having to count.
It should be noted that children do not first solve simple numerical problems exclusively by means of finger counting, then exclusively through verbal counting, and finally through memory retrieval of facts about numbers, known from similar problems solved in the past. Rather, children have available to them a variety of all the above problem-solving strategies. As more arithmetical operations are performed, the available strategies are modified, some are complemented, some are abandoned, while some new ones are constructed from bits and pieces of existing procedures, depending on the new goals the child has set (goal-directed behavior). As the child gradually masters arithmetical operations, the variety of problem solving strategies changes, illustrating a shift from general reliance on finger/object counting, to verbal counting and finally, to more complex strategies like number-decomposition (for example, derived facts like 132 = 1x100 + 3x10 + 2x1) or memory retrieval based strategies. Again, it should be underlined that we are talking about a general shift, not a complete sacrifice of simple, primal problem-solving strategies (like finger counting) in favor of newer, more sophisticated ones (like direct memory retrieval).

Arithmetical Development and Education

It is apparent that the child’s concept of numbers and arithmetic gradually changes, affecting the observable skills. The strongest influence on arithmetical development is formal education, which can lead to the development of skills that would not have emerged in a more natural environment, without formal instruction. We emphasize the importance of education in arithmetical (and therefore mathematical) development, as it is claimed by recent neuropsychology research that "every human being is endowed with a primal number sense, an intuition about numerical relations. Whatever is different in adult brains is the result of successful education, strategies, and memorization"(Dehaene 1997). However, if formal education is so important for arithmetical-mathematical development and achievement, why do so many schoolchildren fear mathematics? Numbers and arithmetic (and therefore mathematics) are part of our everyday life, but why do they seem de-contextual from commonsense and human life when they are taught in classrooms? Moreover, how can modes of teaching affect ways of thinking about numbers? How can different teaching approaches improve children’s arithmetical problem solving strategies?
Traditional approach
Traditional arithmetic curricula focus on the acquisition of basic numerical skills such as number order and counting, addition and subtraction facts, place value, as well as algorithms and procedures for complex addition and subtraction. Emphasis is placed on the dissemination of formal definitions, easily understood by the students who are viewed as "blank slates" onto which information is etched by the teacher, in a didactic manner (Goodrow 1998). The character of that information is mainly procedural knowledge about standard algorithms and methods for arithmetic problem solving. With this "authoritative" pedagogy of arithmetic, children ought to start thinking in a certain way in order to solve numerical problems. Therefore, students might be forced to change their own way of thinking. We think that this approach restricts the variety of useful representations for mathematical thinking. We also hypothesize that the procedural knowledge, taught at traditional schools in the form of "ready to use" methods and algorithms, narrows down children's mental strategies for problem solving.
Constructivism approach
There is strong evidence that the early teaching of standard procedures for arithmetic problem solving "thoroughly distorts in children’s mind the fact that mathematics is primarily reasoning." (Kamii et al.1993). In order to address the above problem, new mathematics curricula have been introduced, based on the Piaget theory of Constructivism. This approach suggests that logico-mathematical knowledge, apart from empirical or social knowledge (Novick 1996), is a kind of knowledge that each child must create from within, in interaction with the environment, rather than acquire it directly (almost "being donated") from the environment. Students are viewed as thinkers with emerging theories about the world while teachers generally refrain from teaching procedures and algorithms but instead, behave in an interactive way with the students, encouraging them to invent their own methodologies for all four arithmetical operations (Goodrow 1998).
Examples and evaluation of the two approaches
Experimental research showed that students in classes using the constructivist approach developed better number sense and at the same time came up with several different representations of arithmetic values and expressions, leading to significantly better performance on numerical operations, compared to their age-mates from "traditional" classes. For example, constructivist students were able to represent the same number with several terms and more than one operation (i.e. 150 = 50x3 = 70+60+20 = 500-400+50) while traditional (non-constructivist) students used only two terms and one operation (12 = 6+6 = 5+7 = 4+8). Performance on 2-digit addition was more or less the same between students of the two groups, however, on 2-digit subtraction and especially in cases with place values, the performance of constructivist students was much better. They could use several different ways to decompose and regroup the numbers, having an excellent number sense, while their non-constructivist age-mates were using the traditional, column-wise from right to left algorithm, making, in a lot of cases, several mistakes with the place value, indicating a poor sense of numbers.
For example, for the simple calculation 28-9, a non-constructivist second-grade student replied:

8-9 is impossible so you cross out 2 and make it 1 and now, take that one and put it with 8, and then 8 has two numbers, and then 9 plus 9 equals 18, so the answer is 19.

One constructivist second-grade student approach was:

28 minus 8 is 20, so the answer is 19 as I have 28-9 instead of 28-8.

Another constructivist approach was:

8-9 is minus 1 so 20 minus 1 is 19.

The last approach is amazing since it involves calculations with negative numbers, which are a difficult notion for second-grade elementary school students. Traditional students would not be able to perform such reasoning, probably because they are not familiar yet with algebra of negative numbers.
Generally, children perform much better using their own ways of thinking rather than standard, taught procedures. The majority of errors among the non-constructivist students are mainly caused because of a lack of number sense and a poor generalization of the standard procedures on unknown problems. That is very natural and can be nicely explained by Minsky’s theory: "Formal definitions lead to meaning networks as sparse and thin as possible." The useful "meanings" are not the flimsy chains of definition but the much harder-to-express networks of ways to remember, compare, and change things. "A logic chain can break easily, but you get stuck less often when you use a web of cross-connected meaning-network."
It should be noted that we are talking about the constructivist approach applied to early classes of elementary school, mainly first and second grade. At this level, the main goal is for children to accumulate a good number sense and practice many different kinds of reasoning (Papert’s Principle). Nevertheless, we believe that a more balanced approach between conceptual knowledge and procedural knowledge should be followed at the next elementary school levels. New algorithms and numerical techniques taught in later classes of elementary school can be built on top of well established, early developed skills like strong number sense. Most likely such a combination of educational approaches would make children expand their numerical and mathematical abilities, without them being reluctant to tamper with their old, tested problem solving strategies (Investment’s Principle).

To answer our initial question, whether number sense is innate or learned: It should be clear by now that both elements, nature as well as nurture, influence a persons early arithmetic reasoning skills. Mathematical reasoning is neither innate nor learned, but most likely a combination of both.
Finally, it should be emphasized that education and educational models are coupled with every society’s culture. Unfortunately, if a versatile and multidimensional arithmetical and mathematical education model stands orthogonal to the prominent cultural ideal, for example, that children’s idols are basketball or football stars, then any educational model proposed, be it constructivist or not, is doomed to fail.

THOMAS ALVA SUBJEC INTERMIATE INTENSIVE ENGLISH

Thomas Alva Edison’s Biography

Thomas Alva Edison was born on February 11, 1847 in Milan, Ohio; the seventh and last
child of Samuel and Nancy Edison. When Edison was seven his family moved to Port Huron,
Michigan. Edison lived here until he struck out on his own at the age of sixteen. Edison had
very little formal education as a c hild, attending school only for a few months. He was
taught reading, writing, and arithmetic by his mother, but was always a very curious child
and taught himself much by reading on his own. This belief in self -improvement remained
throughout his life.
Edison began working at an early age, as most boys did at the time. At thirteen he took a
job as a newsboy, selling newspapers and candy on the local railroad that ran through Port
Huron to Detroit. He seems to have spent much of his free time reading scient ific, and
technical books, and also had the opportunity at this time to learn how to operate a
telegraph. By the time he was sixteen, Edison was proficient enough to work as a
telegrapher full time.
The development of the telegraph was the first step in the communication revolution, and
the telegraph industry expanded rapidly in the second half of the 19th century. This rapid
growth gave Edison and others like him a chance to trave l, see the country, and gain
experience. Edison worked in a number of cities throughout the United States before arriving
in Boston in 1868. Here Edison began to change his profession from telegrapher to inventor.
He received his first patent on an electri c vote recorder, a device intended for use by elected
bodies such as Congress to speed the voting process. This invention was a commercial
failure. Edison resolved that in the future he would only invent things that he was certain the
public would want.
Edison moved to New York City in 1869. He continued to work on inventions related to the
telegraph, and developed his first successful invention, an improved stock ticker called the
"Universal Stock Printer". For this and some related inventions Edison was paid $40,000.
This gave Edison the money he needed to set up his first small laboratory and
manufacturing facility in Newark, New Jersey in 1871. During the next five years , Edison
worked in Newark inventing and manufacturing devices that greatly improved the speed and
efficiency of the telegraph. He also found to time to get married to Mary Stilwell and start a
family.
In 1876 Edison sold all his Newark manufacturing concer ns and moved his family and staff
of assistants to the small village of Menlo Park, twenty -five miles southwest of New York
City. Edison established a new facility containing all the equipment necessary to work on any
invention. This research and developme nt laboratory was the first of its kind anywhere; the
model for later, modern facilities such as Bell Laboratories, this is sometimes considered to
be Edison's greatest invention. Here Edison began to change the
world.
The first great invention developed by Edison in Menlo Park was
the tin foil phonograph. The first machine that could record and
reproduce sound created a sensation and brought Edison
international fame. Edison toured the country with the tin foil
phonograph, and was invited to the White Hou se to demonstrate it
to President Rutherford B. Hayes in April 1878.
Edison next undertook his greatest challenge, the development of a practical incandescent,
electric light. The idea of electric lighting was not new, and a number of people had worked
on, and even developed forms of electric lighting. But up to that time, nothing had been
developed that was remotely practical for home use. Edison's eventual achievement was
inventing not just an incandescent electric light, but also an electric lighting sys tem that
contained all the elements necessary to make the incandescent light practical, safe, and
economical. After one and a half years of work, success was achieved when an incandescent
lamp with a filament of carbonized sewing thread burned for thirteen and a half hours. The
first public demonstration of the Edison's incandescent lighting system was in December
1879, when the Menlo Park laboratory complex was electrically lighted. Edison spent the
next several years creating the electric industry. In Sep tember 1882, the first commercial
power station, located on Pearl Street in lower Manhattan, went into operation providing
light and power to customers in a one square mile area; the electric age
had begun.
The success of his electric light brought Edison to new heights of fame
and wealth, as electricity spread around the world. Edison's various
electric companies continued to grow until in 1889 they were brought
together to form Edison General Electric. Despite the use of Edison in the
company title howev er, Edison never controlled this company. The
tremendous amount of capital needed to develop the incandescent
lighting industry had necessitated the involvement of investment bankers
such as J.P. Morgan. When Edison General Electric merged with its
leading competitor Thompson -Houston in 1892, Edison was dropped from the name, and the
company became simply General Electric.
This period of success was marred by the death of Edison's wife Mary in 1884. Edison's
involvement in the business end of the electric i ndustry had caused Edison to spend less
time in Menlo Park. After Mary's death, Edison was there even less, living instead in New
York City with his three children. A year later, while vacationing at a friends house in New
England, Edison met Mina Miller a nd fell in love. The couple was married in February 1886
and moved to West Orange, New Jersey where Edison had purchased an estate, Glenmont,
for his bride. Thomas Edison lived here with Mina until his death.
When Edison moved to West Orange, he was doing experimental work in makeshift facilities
in his electric lamp factory in nearby Harrison, New Jersey. A few months after his marriage,
however, Edison decided to build a new laboratory in West Orange itself, less than a mile
from his home. Edison possesse d the both the resources and experience by this time to
build, "the best equipped and largest laboratory extant and the facilities superior to any
other for rapid and cheap development of an invention ". The new laboratory complex
consisting of five buildi ngs opened in November 1887. A three story main laboratory building
contained a power plant, machine shops, stock rooms, experimental rooms and a large
library. Four smaller one story buildings built perpendicular to the main building contained a
physics lab, chemistry lab, metallurgy lab, pattern shop, and chemical storage. The large
size of the laboratory not only allowed Edison to work on any sort of project, but also
allowed him to work on as many as ten or twenty projects at once. Facilities were added to
the laboratory or modified to meet Edison's changing needs as he continued to work in this
complex until his death in 1931. Over the years, factories to manufacture Edison inventions
were built around the laboratory. The entire laboratory and factory c omplex eventually
covered more than twenty acres and employed 10,000 people at its peak during World War
One (1914-1918).
After opening the new laboratory, Edison began to work on the phonograph again, having
set the project aside to develop the electric l ight in the late 1870s. By the 1890s, Edison
began to manufacture phonographs for both home, and business use. Like the electric light,
Edison developed everything needed to have a phonograph work, including records to play,
equipment to record the records , and equipment to manufacture the records and the
machines. In the process of making the phonograph practical, Edison created the recording
industry. The development and improvement of the phonograph was an ongoing project,
continuing almost until Edison' s death

SECUNDARY COLORS AND PRIMARY COLORS

Red, yellow, blue, are the primary colors.
Purple, orange, green are the secondary colors.
Red and yellow, they make orange.
Blue and red, they make purple.
Yellow and blue, they make green.
Mix 'em all together, you get gray.

Chorus:  

Red, yellow, blue are the primary colors.
Purple, orange, green are the secondary colors.
Red, yellow, blue are the primary colors.
Purple, orange, green are secondary.

Red, yellow, blue are the primary colors.
Purple, orange, green are the secondary colors.
Red, yellow, blue are the primary colors.
Purple, orange, green are secondary.

(Spoken):  

Red, yellow, blue, purple, orange, green.
Red, yellow, blue, purple, orange, green.
Red, yellow, blue, purple, orange, green.

Red, yellow, blue are the primary colors.

Chorus

Red and yellow, they make orange.
Blue and red, they make purple.
Yellow and blue, they make green.
Mix 'em all together, you get gray.

Chorus

Red, yellow, blue, are the primary colors.

The Topic: Geometric Shapes and Figures

Easier - Circles, triangles, and squares are shapes. Geometry is the mathematical study of shapes, figures, and positions in space. It is useful in many careers such as architecture and carpentry.

 

Harder - Geometry is the study of measurement and comparison of lines, angles, points, planes, and surfaces and of plane figures and solids composed of combinations of these. A shape is the outer form of an object or figure such as a circle, triangle, square, rectangle, parallelogram, trapezoid, rhombus, octagon, pentagon, and hexagon. There are equilateral, isosceles, and right triangles. A solid is a three-dimensional figure such as a cube, cylinder, cone, prism, or pyramid. Other solid shapes include the tetrahedron, octahedron, and dodescadhedron. Positions in space are things like points, lines, and angles.

 

 

 

Formulas can be used to figure out the dimensions of shapes and figures. Instruments such as rulers, triangles, compasses, and protractors are used in geometry. Today, many people also use graphing calculators and computers in geometry.

 

The Greeks made many contributions to our understanding of geometry. For example, Archimedes is credited as the first to calculate the ratio between a circle's diameter and its circumference now known as pi. Pythagoras is famous for his theorem which states that in any right-angled triangle the sum of the squares on the two shorter sides equals the square of the hypotenuse. However, many people think the Egyptians and Babylonians knew this math much earlier.

PLASTICINE

Plasticine, a brand of modelling clay, is a putty-like modelling material made from calcium salts, petroleum jelly and aliphatic acids. The name is a registered trademark of Flair Leisure Products plc. Plasticine is used extensively for children's play, but also as a modelling medium for more formal or permanent structures.

History
Plasticine was formulated by art teacher William Harbutt of Bathampton, in Bath, England, in 1897. He wanted a non-drying clay for use by his sculpture students. Although the exact composition is a secret, Plasticine is composed of calcium salts (principally calcium carbonate), petroleum jelly, and long-chain aliphatic acids (principally stearic acid). It is non-toxic, sterile, soft, malleable, and does not dry on exposure to air (unlike superficially similar products such as Play-Doh, which is based on flour, salt and water). It cannot be hardened by firing; it melts when exposed to heat, and is flammable at much higher temperatures.A patent was awarded in 1899, and in 1900 commercial production started at a factory in Bathampton. The original Plasticine was grey, but the product initially sold to the public came in four colours. It was soon available in a wide variety of bright colours. Plasticine was popular with children, widely used in schools for teaching art, and has found a wide variety of other uses (for example moulding casts for plaster, and plastics). The Harbutt company promoted Plasticine as a children's toy by producing modelling kits in association with companies responsible for popular children's characters such as Noddy, the Mr. Men and Paddington Bear.
The original Plasticine factory was destroyed by fire in 1963 and replaced by a modern building. The Harbutt company continued to produce Plasticine in Bathampton until 1983. It is currently made in Thailand.

From 1983 to 2006, the brand went through a number of ownership changes and was off the market for a long time. Plasticine was owned by Bluebird Toys plc following its acquisition of Harbutt's parent company, Peter Pan. Then, following Bluebird's takeover by Mattel in 1998, the brand was sold on to Humbrol Ltd, famous for its Airfix kits and model paints. In 2005, Flair Leisure licensed the brand from Humbrol and relaunched Plasticine. A year later, when Humbrol went into administration, Flair bought the Plasticine brand outright.edit Similar products
A similar product, "Kunst-Modellierthon" (known as Plastilin), was invented by Franz Kolb of Munich, Germany in 1880. This product is still available, known as "Münchner Künstler Plastilin" (Munich artists' plasticine). In Italy, the product Pongo is also marketed as "plastilina" and shares the main attributes of Plasticine
Uses
Plasticine is often used in clay animation. One of its main proponents is Aardman Animation's Nick Park, who used characters modeled in Plasticine in his Oscar-winning short films A Grand Day Out (1989), The Wrong Trousers (1993) and A Close Shave (1995), as well as the feature film The Curse of the Were-Rabbit. This technique is popularly known as claymation in the US, and is a form of stop motion animation. Plasticine is appealing to animators because it can be used with ease: it is mouldable enough to create a character, flexible enough to allow that character to move in many ways, and dense enough that it can retain its shape easily when combined with a wire armature.
Plasticine-like clays are also used in commercial party games such as Cranium, Rapidough and Barbarossa.
Television presenter James May together with Chris Collins, Jane McAdam Freud, Julian Fullalove and around 2000 members of the public created a show garden for the 2009 Chelsea Flower Show made entirely of Plasticine called 'Paradise in Plasticine'. The garden took 6 weeks to create and 2.6 tonnes of Plasticine in 24 colours was used. May said, "This is, to our knowledge, the largest and most complex model of this type ever created." It couldn't be considered as part of the standard judging criteria as it contained no real plants, but was awarded an honorary gold award made from Plasticine. The garden was extremely popular with the public and went on to win the Royal Horticultural Society’s 'peoples choice' for best small garden.

EVENING

The day is past, the sun is set,
And the white stars are in the sky;
While the long grass with dew is wet,
And through the air the bats now fly.

The lambs have now lain down to sleep,

The birds have long since sought their nests;

The air is still; and dark, and deep

On the hill side the old wood rests.

Yet of the dark I have no fear,

But feel as safe as when 'tis light;

For I know God is with me there,

And He will guard me through the night.

For God is by me when I pray,

And when I close mine eyes to sleep,

I know that He will with me stay,

And will all night watch by me keep.

For He who rules the stars and sea,

Who makes the grass and trees to grow.

Will look on a poor child like me,

When on my knees I to Him bow.

He holds all things in His right hand,

The rich, the poor, the great, the small;

When we sleep, or sit, or stand,

He is with us, for He loves us all.