In this Cyberchase video segment, Shari Spotter gets help from the CyberSquad in doubling a recipe for crumpets.

In this lesson, students measure and compare the rate of a falling object (a penny) at different heights to learn about statistical error.

Do you have a big decimals test coming up? Or are you studying for your standardized math test? This site is both fun and helpful! On this site you can review the following topics: place values of decimals, how to read decimals, expanded notation for decimals, and how to convert fractions into decimals. On this site you can also review how to add, subtract, multiply, and divide decimals. You will also learn about terminating and repeating decimals.

This short video and interactive assessment activity is designed to teach fifth graders about determining the greatest quotient without calculation.

The Decimals Cruncher game will help you learn about decimal operations! You can choose to practice adding, subtracting, multiplying, or dividing. You can also pick how hard the game is. The game has 4 levels: easy, medium, hard, and killer. The Decimals Cruncher will keep track of your score. When you switch to a new operation (addition, subtraction, multiplication, or division), your score will start over again.

This short video and interactive assessment activity is designed to teach second graders about decomposing decimals into place values up to hundredths.

This short video and interactive assessment activity is designed to teach second graders about decomposing decimals into place values to tenths.

This short video and interactive assessment activity is designed to teach fifth graders about one-step conversions between hundreds, tens, and ones.

This short video and interactive assessment activity is designed to teach fourth graders about completing the expanded forms of numbers (place values to 1,000).

This short video and interactive assessment activity is designed to teach second graders about identifying digit values in numbers (numbers to 10,000).

This short video and interactive assessment activity is designed to teach third graders an overview of telling time to 1-minute intervals.

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

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

This short video and interactive assessment activity is designed to teach fourth graders about elapsed time in a sequence of events - word problems.

This short video and interactive assessment activity is designed to teach fifth graders about determining duration time - one step with timeline.

This short video and interactive assessment activity is designed to teach fifth graders about determining less than or greater than values of a decimal.

This short video and interactive assessment activity is designed to teach fifth graders about determining the elapsed time given start and end time.

This short video and interactive assessment activity is designed to teach fourth graders about determining the order of decimals in word problems.

This short video and interactive assessment activity is designed to teach fifth graders about determining the product of two decimals without calculation.