Making a 10 provides a technique to help students master single digit addition. The task is designed to help students visualize where the 10's are on a single digit addition table and explain why this is so. This knowledge can then be used to help them learn the addition table.

This task provides three types of comparison problems: Those with an unknown difference and two known numbers; those with a known difference and a bigger unknown number; and those with a known difference and smaller unknown number. Students may solve each type using addition or subtraction, although the language in specific problems tends to favor one approach over another.

This short video and interactive assessment activity is designed to teach fourth graders about matching the time to the clock.

The purpose of the task is for students to solve a multi-step multiplication problem in a context that involves area. In addition, the numbers were chosen to determine if students have a common misconception related to multiplication.

In this task students work with partners to measure themselves by laying multiple copies of a shorter object that represents the length unit end to end. It gives students the opportunity to discuss the need to be careful when measuring.

This short video and interactive assessment activity is designed to teach fifth graders about single object length ii (english units).

This short video and interactive assessment activity is designed to teach fifth graders about converting meters to centimeters.

This short video and interactive assessment activity is designed to teach fifth graders about converting kilometers to meters.

This short video and interactive assessment activity is designed to teach fifth graders about converting meters to millimeters.

This short video and interactive assessment activity is designed to teach first graders about how big is a meter?.

This short video and interactive assessment activity is designed to teach fourth graders about introduction to metric measures: how big is a meter?.

This short video and interactive assessment activity is designed to teach fourth graders about adding lengths in meters.

This short video and interactive assessment activity is designed to give fifth graders an overview of conversion of capacity units (metric units).

This short video and interactive assessment activity is designed to give fourth graders an overview of conversion of capacity units (metric units).

This short video and interactive assessment activity is designed to teach fifth graders about converting centimeters to millimeters with decimals.

This short video and interactive assessment activity is designed to teach fifth graders about comparing meters, centimeters, and millimeters.

This short video and interactive assessment activity is designed to teach fourth graders about multiplication of lengths (metric units).

This short video and interactive assessment activity is designed to teach fourth graders about subtracting lengths in meters.

This short video and interactive assessment activity is designed to teach fourth graders about mixed adding and subtracting of capacities (english units).