Order three objects by length; compare the lengths of two objects indirectly by using a third object.

Lesson Planning and Activity Resources

1.MD.A.1 From Illuminations: Use a number line to compare lengths and find differences.

Math Playground.JPG
1.MD--Interactive games for Measurement & Data

Grade 1 Unit: Sorting, Comparing, and Ordering
(from Georgia Department of Education)
This unit addresses KCAS 1.MD.1-4.
common core sheets.JPG
  • Interactive Material - Order the blocks by length.
  • Worksheets comparing the length of three different sized bars.