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PlayOwl

Mathematics · Grade 1

Measure and Compare Length

How long is it? Learners order objects by length, compare two lengths that cannot be put side by side by using a string as a go-between, and measure lengths by laying same-size units such as cubes end to end with no gaps or overlaps. They learn to spot measuring mistakes and explain why they change the answer.

  • 3 lessons
  • About 55 minutes
  • Length check: 8 questions
  • Ways to answer: choose an answer, count, type a number, put in order, sort into groups and true or false
See plans Included with Family, Teacher and School plans. Open in PlayOwl

What learners will discover

  • Order three objects by length and compare two lengths indirectly by using a third object.
  • Measure a length by laying same-size units end to end and say the length as a number of units.
  • Check a measurement for the rules (start at the end, no gaps, no overlaps, same-size units) and explain how a mistake changes the count.

Lessons

  1. Order and compare 4 steps2 practiceabout 18 min
  2. Measure with units 5 steps3 practiceabout 18 min
  3. Measure carefully 6 steps3 practiceabout 19 min
  4. Length check 8 questions at the end

Keep exploring

Games to practice with

  • Number-Line HopHelp the frog hop to the right number — from counting to negative fractions.
  • Paint by AnswersSolve each space, dip your brush and watch a picture come to life.
  • Number TrainAll aboard! Load exactly the right number of animals onto the train.

More 1st grade math

Guide for grown-ups