Teaching and Group Activities for Understanding
Day 1 Teaching
Point out how important it is that we know bonds to 10. Use fingers to rehearse the pairs of numbers which make 10, and play finger Ping-Pong. Identify matching pairs which make 10; write number sentences. Spot addition pairs to 10, mixed in with pairs having other totals.
-- Use a ‘ten-grid’ to visualise number bonds to 10.
-- Turn a card and say the matching number bond to 10 or 20 before the time runs out.
Day 2 Teaching
Use a bead bar 1-100 and demonstrate how many beads we need to add to 18 to make 20, then to 28 to make 30, then to 38 to make 40, etc. Can you see the pair to 10 which helps here? Repeat to show 25 plus 5, then 35 plus 5, etc. Then show 46 + 4 = 50, 56 + 4 = 60, etc.
-- Turn over a 3-8 card; work out how many more to add to reach the next 10 (working with numbers up to 100).
-- Work out a missing number using number bonds.
Day 3 Teaching
Use a 1-100 number grid. Point at 47. How many more to reach 50? Say you do NOT want them to count on in 1s! Which number bond can help? Use Fly to model a short flight of 3 from 47 to 50. Record 7 + 3 = 10 and 47 + 3 = 50. Repeat, starting on 38, then 56 and 91, using Fly.
Use the ‘10 to 50 challenge’ in-depth problem-solving investigation below as today’s group activity.
Or, use these activities:
-- Pairs game, matching numbers with corresponding number bond to 10.
-- Learn a number bond song. Use number bonds to create number sentences.