Thinkabara

🧮 2nd Grade · Math2.MD.B.6Unit 9: Measuring length

Length on a number line

Google Classroom

🎯 Objective: Students solve length word problems using a number line diagram.

Lesson outline

  1. Model a ruler as a number line.
  2. Solve add/subtract length problems.
  3. Partners create problems.
  4. Exit: one number line problem.

Lesson 6 of 6 in this unit. In the Lesson Planner this lesson takes 1–3 class periods depending on your timetable: day 1 introduce & model, then practice, small-group reteach and a quick check.

📐 Standard

2.MD.B.6

Common Core State Standards for Mathematics, Grade 2 — typical US scope & sequence

🏁 Unit goals

  • Measure length with rulers, yardsticks and meter sticks
  • Estimate lengths and compare measurements
  • Solve length problems with a number line

✅ Check for understanding

End with the exit ticket in the outline. Sort answers into got it / almost / not yet and start the next lesson with a 5-minute reteach for the “not yets”.

Practice & resources on Thinkabara

🎯 Practice: Money & time to 5 minutes📚 All 2nd Grade skills🎮 Learning games⚡ Capy Live class quiz

🗓️ Plan the whole year like this

Add 2nd Grade Math to your free Lesson Planner: enter your timetable once and every period shows the next lesson, skipping weekends and school breaks.

Add to my planner See the year’s sequence

More lessons in “Measuring length”

  1. Inches and feet
  2. Centimeters and meters
  3. Estimate length
  4. Different units, different numbers
  5. How much longer?
  6. Length on a number line

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