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

This short video and interactive assessment activity is designed to teach fifth graders about converting kilograms and grams into grams.

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

This task provides an opportunity to work on the Standard for Mathematical Practice 3 Construct Viable Arguments and Critique the Reasoning of Others.

This short video and interactive assessment activity is designed to teach fourth graders about converting years into weeks.

This short video and interactive assessment activity is designed to teach fourth graders about converting years to days.

This short video and interactive assessment activity is designed to give fourth graders an overview of comparison of weights (english units).

In this Cyberchase video segment, Matt uses subtraction to help Digit figure out how much time he has left in a cooking contest with Hacker.

While the task as written does not explicitly use the term "unit rate," most of the work students will do amounts to finding unit rates. A recipe context works especially well since there are so many different pair-wise ratios to consider.

A brief refresher on the Cartesian plane includes how points are written in (x, y) format and oriented to the axes, and which directions are positive and negative. Then students learn about what it means for a relation to be a function and how to determine domain and range of a set of data points.

Students practice counting sequences by standing in a circle and counting one by one.

This short video and interactive assessment activity is designed to teach second graders about counting cubes and creating a place value diagram.

Students who work on this task will benefit in seeing that given a quantity, there is often more than one way to represent it, which is a precursor to understanding the concept of equivalent expressions.

This task gives students another way to practice counting and gain fluency with connecting a written number with the act of counting. This task should be introduced by the teacher and would then be a good independent center.

The most engaging way to practice counting with students is to have them count meaningful things in their lives. Since five-year-olds are very focused on themselves this is easily done by allowing them to count themselves, their friends and objects within the classroom that relate to their daily lives.

This short video and interactive assessment activity is designed to teach first graders about counting rectangles, squares, and triangles in composite figures.

This short video and interactive assessment activity is designed to teach fourth graders about counting right angles in a turn.

This challenging problem and brainteaser gives first graders an opportunity to compose and decompose squares.