Thinkabara

🧮 4th Grade · Math4.G.A.3Unit 11: Angles, lines & shapes

Lines of symmetry

Google Classroom

🎯 Objective: Students find lines of symmetry in shapes and letters.

Lesson outline

  1. Fold letters and shapes to find lines of symmetry.
  2. Draw lines of symmetry.
  3. Make a symmetric design.
  4. Exit: how many lines of symmetry does a square have?

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

4.G.A.3

Common Core State Standards for Mathematics, Grade 4 — typical US scope & sequence

🏁 Unit goals

  • Measure and draw angles with a protractor
  • Classify shapes by lines and angles
  • Identify lines of symmetry

✅ 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: Angles & lines📚 All 4th Grade skills🎮 Learning games⚡ Capy Live class quiz

🗓️ Plan the whole year like this

Add 4th 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 “Angles, lines & shapes”

  1. Points, lines, rays and angles
  2. Angles as turns
  3. Measure and draw angles
  4. Adding angles
  5. Parallel and perpendicular lines
  6. Lines of symmetry

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