This short video and interactive assessment activity is designed to teach third graders about turning words into numbers using place value models.

Both of the questions in this task are solved by the division problem 12Ö3 but what happens to the ribbon is different in each case.

In this video segment from Cyberchase, Harry must adjust his dinner budget after his cousin, Harry, unexpectedly decides to join him on his date

In this lesson designed to enhance literacy skills, students examine how to use fractions to measure and help conserve freshwater resources.

This short video and interactive assessment activity is designed to teach fourth graders about using the four operations with money - word problems.

This short video and interactive assessment activity is designed to teach third graders about understanding division with remainders and illustrations.

This short video and interactive assessment activity is designed to teach fourth graders about place value problems involving money.

This short video and interactive assessment activity is designed to teach second graders about using timelines to 1-minute increments.

This short video and interactive assessment activity is designed to teach fourth graders about adding and subtracting - missing number.

This short video and interactive assessment activity is designed to teach fifth graders about adding and subtracting - missing number.

This short video and interactive assessment activity is designed to teach fifth graders about adding and subtracting with parentheses - missing number.

The goal of this task is to provide examples for comparing two fractions by finding a benchmark fraction which lies in between the two.

This task highlights a slightly different aspect of place value as it relates to decimal notation. More than simply being comfortable with decimal notation, the point is for students to be able to move fluidly between and among the different ways that a single value can be represented and to understand the relative size of the numbers in each place.

This lesson unit is intended to help teachers assess how well students are able to understand and use directed numbers in context. It is intended to help identify and aid students who have difficulties in ordering, comparing, adding, and subtracting positive and negative integers. Particular attention is paid to the use of negative numbers on number lines to explore the structures: starting temperature + change in temperature = final temperature final temperature Đ change in temperature = starting temperature final temperature Đ starting temperature = change in temperature.

This short video and interactive assessment activity is designed to teach third graders about using timelines to 1-minute increments.

This short video and interactive assessment activity is designed to teach fourth graders about using timelines to 1-minute increments.

Students develop a physical understanding for the meaning of equality by trying to find equal lengths using rods.

This task helps students broaden and deepen their understanding of the equals sign and equality.

This problem asks the student to evaluate six numerical expressions that contain the same integers and operations yet have differing results due to placement of parentheses. It helps students see the purpose of using parentheses.