## Try one of our sample lessons Try Lesson:

#### 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. Try Lesson:

#### 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. Try Lesson:

#### 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. Try Lesson:

#### 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. Try Lesson:

#### Coordinate Grids: Lines of Reflection

Students reflect points on a coordinate grid over a line of reflection. Try Lesson:

#### Supplementary and Vertical Angles

Students reason deductively about supplementary, vertical, and adjacent angles to make rotations, aim for targets, and determine angle measurements.