This short video and interactive assessment activity is designed to teach second graders an overview of addition (sums to 1,000).

This short video and interactive assessment activity is designed to give fourth graders an overview of addition (sums to 1,000).

This short video and interactive assessment activity is designed to teach third graders an overview of addition (sums to 1,000).

This is a task from the Illustrative Mathematics website that is one part of a complete illustration of the standard to which it is aligned. Each task has at least one solution and some commentary that addresses important aspects of the task and its potential use.

The purpose of this task is to address the concept of opportunity cost through a real world context involving money.

The goal of this task is to help students understand the commutative property of addition by examining the addition facts for single digit numbers. This is important as it gives students a chance, at a young age, to do more than memorize these arithmetic facts which they will use throughout their education.

This version of Go Fish allows students to practice recognizing and saying the teen numbers.

This short video and interactive assessment activity is designed to teach third graders an overview of before and after (time).

This short video and interactive assessment activity is designed to teach second graders an overview of before and after (time).

This short video and interactive assessment activity is designed to teach fourth graders about telling the time - before and after.

This short video and interactive assessment activity is designed to teach third graders an overview of tessellations.

This short video and interactive assessment activity is designed to give fifth graders an overview of tessellations.

This short video and interactive assessment activity is designed to give fourth graders an overview of tessellations.

This short video and interactive assessment activity is designed to teach third graders about determining unknown angles in composite figures.

This short video and interactive assessment activity is designed to teach fourth graders about determining unknown angles in composite figures.

The purpose of this task is to help students understand composing and decomposing ones, tens, and hundreds. This task is meant to be used in an instructional setting and would only be appropriate to use if students actually have base-ten blocks on hand.

This short video and interactive assessment activity is designed to give fourth graders an overview of time conversion between words and numbers.

This short video and interactive assessment activity is designed to teach second graders an overview of time patterns.

This short video and interactive assessment activity is designed to teach third graders an overview of time patterns.