The activities throughout the materials allow the students to use, interpret, and compare numbers. Interpreting fractions includes comparing denominators and numerators, finding equivalent fractions, and locating fractions on number lines. I emphasizes the equivalence of fractions, percents, and decimals. In the grade 7 unit Comparing and Scaling, the focus is on comparisons among ratios, fractions, decimals, and percents. Accentuate the Negative and Data Around Us.
Shapes can match exactly or have the same shape in different sizes.
All ideas in the benchmark are addressed except the idea about circles having the least boundary. The grade 6 unit Shapes and Design focuses on regular polygons and develops the special properties of quadrilaterals and parallelograms. The text explains the concept of the rigid structure of a triangle in a building polygons investigation. The grade 7 unit Stretching and Shrinking presents the concept of similarity and special properties of shapes including enlarging figures, patterns of similar figures, and similar triangles. In the lessons, students learn about the different properties of figures and how to determine the different properties that may cause them to be similar or not.