Thinkabara

🧮 8th Grade · Math8.NS.A.1Unit 7: Roots & the Pythagorean theorem

Irrational numbers

Google Classroom

🎯 Objective: Students identify irrational numbers and approximate them.

Lesson outline

  1. Estimate √2.
  2. Place on a number line.
  3. Practice.
  4. Exit: place √10.

Lesson 2 of 5 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.NS.A.1

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

🏁 Unit goals

  • Use square and cube roots
  • Know irrational numbers
  • Apply the Pythagorean theorem

✅ 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

📚 All 8th Grade skills🎮 Learning games⚡ Capy Live class quiz

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More lessons in “Roots & the Pythagorean theorem”

  1. Square and cube roots
  2. Irrational numbers
  3. The Pythagorean theorem
  4. Using the theorem
  5. Distance on the plane

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