First, students will learn how to round to the nearest 10 or 100 by plotting on a number line.

Watch these Khan Academy videos:

Round to nearest 10 or 100 on the number line by Khan Academy

Next, students will learn how to round to the nearest 10 or 100 using their understanding of place value.

Rounding to nearest 10 and 100 by Khan Academy

Do these Khan Academy exercises:

Conclude by leading this investigation:

Tortoise and Hare – The Revenge Race (skip counting, pattern)

by MathPickle

3.NBT.A.1 Use place value understanding to round whole numbers to the nearest 10 or 100.