Teaching and Group Activities for Understanding
Day 1 Teaching
Revise placing 2-digit numbers on a 0–100 landmarked line. Understand place value in 2-digit numbers and use this to place numbers on the line.
Use the in-depth problem-solving investigation ‘Reasoned Rounding’ from NRICH as today’s group activity.
Or, use these activities:
-- Mark 2-digit numbers on 0–100 lines.
-- Mark 2-digit numbers on lines and create inequality sentences. Also write numbers in between.
Day 2 Teaching
Use number lines 0–100, then 100–200 and then 0–1000.
Show on a beaded bar and use this to count by 10s. Children place given numbers on their own landmarked lines.
-- Mark 3-digit numbers on lines with accuracy. Compare.
-- Mark numbers on 0–100 grids and landmarked lines and check each other’s work.
Day 3 Teaching
Children use place value cards (or arrow cards) to create 3-digit numbers. Compare the numbers. Then write the numbers on a place value grid and use this to compare them. Which number has the most hundreds? The most tens? Children then order three 3-digit numbers.
-- Make greatest and least possible 3-digit numbers from 3 digits.
-- Whole class investigation looking at combinations of numbers possible using three digits.