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🧮 8th Grade · Math8.G.A.3Unit 2: Dilations, similarity & slope

Dilations

Google Classroom

🎯 Objective: Students dilate figures with a center and scale factor.

Lesson outline

  1. Rubber-band dilations.
  2. Coordinate rules.
  3. Practice.
  4. Exit: dilate by 2.

Lesson 1 of 3 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

8.G.A.3

Common Core State Standards for Mathematics, Grade 8 — typical US scope & sequence

🏁 Unit goals

  • Describe dilations
  • Use similar triangles to explain slope

✅ 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: Pythagorean theorem📚 All 8th Grade skills🎮 Learning games⚡ Capy Live class quiz

🗓️ Plan the whole year like this

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More lessons in “Dilations, similarity & slope”

  1. Dilations
  2. Similar figures
  3. Slope from similar triangles

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