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7722356 |
Method and apparatus for the manipulation of fractions using transparencies
The invention provides a method and apparatus for operations of addition, subtraction, multiplication, and division of fractions, decimals, percents, proportions and equations. It allows the...
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6575755 |
Fraction circle
A mathematical teaching aid includes a plurality of sectional pieces representing fractions of a circle. The pieces are preferably colored corresponding to respective fractions, wherein fraction...
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6293800 |
Educational and entertainment device
An educational and entertainment device includes n layers stackable in a predetermined order one on top of the other to define a tower having n layers. The xth layer, where x varies between 1 and...
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6192594 |
Fraction ruler
An educational apparatus used for the teaching of mathematical operations that use fractions. A triangular shaped ruler prism has three different side surfaces that are joined together at three...
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5679002 |
Fractional-arithmetic-teaching game and method for playing
An apparatus and a method for playing a math-teaching board game which enables a player student while manipulating game-pieces to gain an understanding of the concept of fractions and arithmetical...
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5597308 |
Assembly including interlocking components for teaching mathematical concepts
An assembly for teaching mathematical concepts includes a plurality of interlocking components, each having at least one connecting end so that the components can be combined in any order or...
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5470234 |
Circular, piece-matching math educational aid
A design for a circular, piece-matching math educational aid is disclosed. It contains a holding plate and various fraction pieces. The circular holding plate has a clockwise spiral bottom,...
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5192077 |
Fraction illustrating polyhedron
A polyhedron with indicia carrying sections, for example a cube. The polyhedron is comprised of a first plurality of first larger sections, e.g. two halves of the cube, and the two larger sections...
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5076793 |
Fractal mathematics kit
A fractal mathematics learning kit includes a plurality of boards each in the shape of an equilateral triangle having defined thereon a pattern of ten smaller equilateral triangles, and a plurality...
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4914019 |
Multi-purpose learning device
This invention deals with a multi-purpose learning device for mathematics, language, logic reasoning, and classification of objects.
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4778390 |
Method and apparatus for teaching fractions
The present invention is directed to a method and apparatus for teaching fractions to school age children. The invention provides an instrument having a base with at least two aligned scales of...
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4730831 |
Game with board, playing pieces and award pieces
A playing board with paths thereon, each made up of a series of squares. Playing pieces are moved along the paths, and at certain locations are instructions for picking up award pieces, which are...
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4614042 |
Measuring and instructional ruler device
A measuring and instructional ruler device is provided for use by children and persons having learning impediments or physical handicaps. The device is comprised of a base panel having one inch...
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3996675 |
Instructional birthday cake toy
An instructional birthday cake toy which has a recreational and educational function for children. The cake comprises various pie-wedge shaped fractional divisions to teach the concepts of...
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3935649 |
Multi-purpose mathematical aid
A multi-purpose mathematical aid designed to allow students, especially children, to see mathematical relationships by manipulation of materials. In its preferred form the mathematical aid...
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3871114 |
Device for teaching the addition of fractions
A device for teaching addition and subtraction, respectively comprising a board having a longitudinal insert recess, a plurality of bars having the same width and a plurality of blocks, the blocks...
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3204344 |
Apparatus for teaching division by fractions
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3171217 |
Educational apparatus for teaching mathematics
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3003256 |
Fraction-abacus
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2930146 |
Arithmetical aid for teaching fractions
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2926432 |
Device for demonstrating fractions and decimal equivalents
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2826829 |
Fraction demonstrating device
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2803069 |
Classroom teaching device
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