What number comes after 39?
Counting on, counting back and the number line
Year 1 · Key Stage 1 · 1NPV-1, 1NPV-2, 1NF-2 — Count within 100; place numbers to 20; count in 2s, 5s and 10s
Draft — awaiting teacher review
Builds on: Number bonds to 10 (Year 1)
I
Concept Anchor
When we count on, each number is one more. On a number line, numbers get bigger to the right.
Worked example
Where is 12 on the number line?
- 1.Find 10.
- 2.Count on 2 marks: 11, 12.
- 3.The arrow is on 12.
II
Guided Check
Count in tens: 10, 20, 30, ?
III
Independent Diagnostic Practice
What number is the arrow on?
Count in fives: 5, 10, ?, 20. What is missing?