### Teaching and Group Activities for Understanding

**Day 1 Teaching**

Mark 2-digit numbers on 0–100 beaded, landmarked and empty lines. Mark 3-digit numbers on 0–1000 landmarked lines and place numbers between multiples of 100.**Group Activities: T with Y3**

Y3 -- Place 2-digit numbers on empty and landmarked lines.

Y4 -- Place 3-digit numbers on empty and/or landmarked lines.

**Day 2 Teaching**

Use skills learned to place numbers between 0 and 100 to place numbers between 100 and 200, then on 0–1000 landmarked lines.

**Further Teaching with Y4**

Place 4-digit numbers on 0 to 10,000 landmarked lines.**Group Activities: T with Y4**

Use the in-depth problem-solving investigation ‘Round the Three/ Four Dice’ from NRICH as today’s group activity.

Or, use these activities:

Y3 -- Mark numbers on 100–200, or 0–1000, landmarked lines.

Y4 -- Place multiples of 50 on 0–10,000 landmarked lines, find the number halfway between them; order 4-digit numbers.

**Day 3 Teaching**

Play a game comparing 3-digit numbers (Y3) and 4-digit numbers (Y4) and place them on landmarked lines.

**Whole Class Activity: T to circulate**

-- Play a game comparing 3-digit numbers (Y3) and 4-digit numbers (Y4) and place them on landmarked lines. The winner of each round wins a digit card, which they use to try to make the larger number once the game has finished.