Thinkabara

🧮 8th Grade · Math8.F.A.1Unit 5: Functions

What is a function?

Google Classroom

🎯 Objective: Students decide whether relations are functions.

Lesson outline

  1. Vending machine analogy.
  2. Tables and mappings.
  3. Practice.
  4. Exit: is this a function?

Lesson 1 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.F.A.1

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

🏁 Unit goals

  • Understand a function as a rule with exactly one output per input
  • Compare and construct functions; describe graphs qualitatively

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

🗓️ Plan the whole year like this

Add 8th Grade Math to your free Lesson Planner: enter your timetable once and every period shows the next lesson, skipping weekends and school breaks.

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More lessons in “Functions”

  1. What is a function?
  2. Comparing functions
  3. Linear vs nonlinear
  4. Modeling with functions
  5. Describing graphs

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