Help your students learn how long a minute is with this lesson that shows them how the length of a minute can appear to change depending on the activity, all while putting their time estimation skills to the test.

Get your students moving as they learn how to round whole numbers. In this lesson your students will use number lines and kinesthetic movement to practice rounding numbers to the nearest ten or hundred.

Master rounding and estimating skills by having students challenge their classmates in the Make a Big Difference game. Roll three dice two times to arrive at two three-digit numbers. The largest difference wins!

Get your students explaining estimations and measurements of liquid volumes and masses of objects! Use this lesson independently or alongside Estimating Measurements of Mass and Volume Using Metric Units.