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Glossary of ManipulativesAngLegs™ AngLegs enable students to study polygons, perimeter, area, angle measurement, side lengths, and more. The set includes 72 snap-together AngLegs pieces (12 each of six different lengths) and two snap-on View Thru™ protractors.

Base Ten BlocksBase ten blocks include unit blocks (1 cm on a side), as well as rods that represent 10 units, flats that represent 100 units, and cubes that represent 1,000 units. They can be used to teach number and place-value concepts, such as the use of regrouping in addition and subtraction. They can also be used to teach measurement concepts, such as area and volume.

Centimeter CubesThese plastic cubes are 1 cm on a side and come in 10 colors. They can be used to teach counting, patterning, and spatial reasoning. They are suitable for measuring area and volume and may also be used to generate data for the study of probability.

Color TilesThese 1” square plastic tiles come in four different colors: red, blue, yellow, and green. They can be used to explore many mathematical concepts, including those associated with geometry, patterns, and number sense.

Cuisenaire® RodsCuisenaire Rods include Rods of 10 different colors, each corresponding to a specific length. White Rods, the shortest, are 1 cm long. Orange Rods, the longest, are 10 cm long. Rods allow students to explore all fundamental math concepts, including addition and patterning, multiplication, division, fractions and decimals, and data analysis.

Deluxe Rainbow Fraction® Circles The set consists of nine color-coded, 4” plastic circles representing a whole, halves, thirds, fourths, fifths, sixths, eighths, tenths, and twelfths. The circles enable students to explore fractions, fractional equivalences, the fractional components of circle graphs, and more.

Deluxe Rainbow Fraction® Squares The set consists of nine color-coded, 10 cm plastic squares representing a whole, halves, thirds, fourths, fifths, sixths, eighths, tenths, and twelfths. The squares enable students to explore fractions, fractional equivalences, and more.

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Fraction Tower® Equivalency Cubes Faction Tower Equivalency Cubes snap together to demonstrate fractions, decimals, and percentages. Each tower is divided into stacking cubes that represent a whole, halves, thirds, fourths, fifths, sixths, eighths, tenths, or twelfths. Each cube is labeled with the part of a whole that it represents. One side shows the fraction, another shows the decimal, and a third shows the percentage. The fourth side is blank. Students can turn the cubes or towers to see each of the representations of the same value. Towers, or portions of towers, can be compared with each other.

GeoboardThe double-sided geoboard is 7.5" square and made of plastic. One side has a 5 x 5 peg grid. The other has a circle with a 12-peg radius. Students stretch rubber bands from peg to peg to form geometric shapes. The geoboard can be used to study symmetry, congruency, area, and perimeter.

GeoReflector™ Mirror This mirror is made of colored, transparent plastic so that the mirror image of an object placed in front of the mirror appears superimposed on the background behind the mirror. The mirror can be used to help students understand transformations, symmetry, and congruence.

Pattern Blocks Pattern blocks come in six different color–shape varieties: yellow hexagons, red trapezoids, orange squares, green triangles, blue parallelograms, and tan rhombuses. They can be used to teach concepts from all strands of mathematics; for example, algebraic concepts such as patterning and sorting, as well as geometry and measurement concepts such as transformations, symmetry, and area. The blocks can also be used to study number and fraction relationships.

Polyhedral Dice These dice come in 4-, 6-, 8-, 10-, 12-, and 20-sided varieties and are most typically used for probability activities. They may be used to generate data for number and operations activities and for data analysis.

Rainbow Fraction® Rings These five plastic rings are used with the Deluxe Rainbow Fraction Circles to make measurements related to circles and fractions of circles. The set consists of a Degree Measurement Ring, a Fraction Measurement Ring, a Decimal Measurement Ring, a Percent Measurement Ring, and a Time Measurement Ring.

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Relational GeoSolids®

Relational GeoSolids are 14 three-dimensional shapes that can be used to teach about prisms, pyramids, spheres, cylinders, cones, and hemispheres. GeoSolids facilitate classroom demonstrations and experimentation. The shapes can be filled with water, sand, rice or other materials to give students a concrete framework for the study of volume.

Snap Cubes® These cubes come in ten colors and can be snapped together to build rectangular prisms and other three-dimensional shapes. They can be used to help students develop spatial sense and learn about surface area and volume.

SpinnersSpinners enable students to study probability and to generate numbers and data lists for number operations and data analysis.

Two-Color CountersThese versatile counters are thicker than most other counters and easy for students to manipulate. They can be used to teach number and operations concepts such as patterning, addition and subtraction, and multiplication and division. Counters can also be used to introduce students to basic ideas of probability.

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