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Grades K-2 Sample Lessons
Numbers to One Hundred on the MathRack
Using a ten-wire MathRack, students recognize and apply patterns of five, ten, and fifty to develop early counting.
Build Expressions Equal to Twenty
Using expressions that have one to three addends, this tool engages students in understanding various number pairs that equal up to twenty.
Grades 3-5 Sample Lessons
Addition on the Number Line Using Landmark Numbers
Using an open number line, students leverage landmark numbers such as tens and hundreds to solve addition problems.
Multiplication: Open Arrays
Students compose arrays, use partial products, and develop understanding of the distributive property to mentally multiply up to 3-digit by 3-digit numbers.
Grades 6-8 Sample Lessons
Coordinate Grids: Lines of Reflection
Students reflect points on a coordinate grid over a line of reflection.
Supplementary and Vertical Angles
Students reason deductively about supplementary, vertical, and adjacent angles to make rotations, aim for targets, and determine angle measurements.