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Adding within 20

KS1 · 15 minutes · Add two numbers up to 20 using number bonds.

Visual learning map for Adding within 20: observe, try, then explain. Add two numbers up to 20 using number bonds.
Visual learning map for Adding within 20: observe, try, then explain. Add two numbers up to 20 using number bonds.

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Our learning goal

Add two numbers up to 20 using number bonds.

Your turn: Choose one thing you would like to understand by the end.

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My lesson notes & project
Full teaching script
  1. Today: Adding within 20. Our goal: Add two numbers up to 20 using number bonds.
  2. Take one idea at a time. Pause after each sentence; ask for repetition whenever you need it.
  3. Number bonds are pairs that make ten: 6+4, 7+3, 8+2. When you add 8+5, first make ten (8+2) then add what's left (3). Ten and three is thirteen.
  4. Together: choose one example from the explanation and show how it works. What do you notice?
  5. Your turn: Make ten different bonds to ten with counters.
  6. Reflect: what made sense, and what would you like explained differently?
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