Students add the correct suffix (-ness, -ful and -ment) to a root word.

This short video and interactive assessment activity is designed to teach fourth graders about two-step subtraction of weights (english units) - word problems.

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

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

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

This short video and interactive assessment activity is designed to teach fifth graders about subtracting decimals - word problems.

For this activity, students practice solving word problems by adding and subtracting fractions with like denominators.

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

This short video and interactive assessment activity is designed to teach fifth graders about adding and subtracting mixed numbers - word problems.

This short video and interactive assessment activity is designed to teach fifth graders about adding and subtracting money with pictures in columns.

This short video and interactive assessment activity is designed to teach fourth graders about adding and subtracting money using words.

This short video and interactive assessment activity is designed to teach fifth graders about adding and subtracting money using words.

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

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

This short video and interactive assessment activity is designed to teach second graders about mixed operations: addition and subtraction i - word problems.

This is a adding and subtracting polynomials assignment that includes an answer key and a QR code for students to check their own work. 

This short video and interactive assessment activity is designed to teach second graders about adding or subtracting lengths in one step.

This short video and interactive assessment activity is designed to teach fourth graders about adding or subtracting lengths in one step (english units).

In this assessment task, students compute problems that add and subtract 10s and 100s and explain their thinking.