Here are two sums: 4 × 7 and 7 × 4. Is one bigger than the other, or are they the same? Hands up when you think you know.
Take three hands-up answers, not open call-outs. Most will say they are equal — hold out for why without confirming yet. Leave both sums on the board; the balance beam in the next step is how the class settles it.
Watch the balance beam. Each time two expressions are set on the pans. Before the second pan appears, predict: will the beam stay level or tip?
Commutative, 4 × 7 vs 7 × 4 — pause before the second pan, take a level-or-tip prediction. Order swaps, both pans hold 28. Name the property, point to it.
Associative, (2 + 3) + 5 vs 2 + (3 + 5) — nominate a pupil to name it before you reveal. Brackets move, total holds at 10.
Distributive, 4 × 6 = 4 × 5 + 4 × 1 — the load-bearing one. Say four sixes is the same as four fives and four ones as the split shows; both pans hold 24. Draw out why each part is multiplied then added.
8 − 3 vs 3 − 8 — the surprise. Ask what happens swapping a subtraction: you cannot take 8 from 3, right pan holds nothing, beam tips. So order does not always keep things equal.
Now we test each property on the beam together. We reset the same beam for each round. Predict level or tipped before each one is set:
Talk this one through together — pupils take turns at the board and the class agrees or corrects out loud.
Run explore mode on the single beam, resetting it for each round: set both pans to 15/15 for the first, 7/7 for the second, then 24/24 for the distributive one. Take a predicted level-or-tipped before each. The distributive round (4 × (5 + 1) = 4 × 5 + 4 × 1 = 24) is worth lingering on — say it aloud as four sixes is the same as four fives and four ones. Watch for pupils who think the brackets change the answer.
In your maths copy, use these three headings, one per section. A worked example is shown under each — write one more of your own beneath it and check that both sides give the same answer.
Walk the room glancing at the three headings and whether both sides of each pupil's own example match — this is whole-class copybook practice, not marking. Prompt any pupil whose distributive example only multiplies one part of the bracket. Hand the Properties template printable to support pupils so the worked examples are in front of them as they write.
Today we work through these together on the board. Each round shows one full pan. You build the other pan so the beam stays level, then press Check:
This is the practice round — pupils take turns at the board, build the empty pan, and the class confirms before moving on. Keep the board work brisk rather than over-explaining.
The rounds build from a plain order-swap to using the distributive split to make a hard fact easier. On the last two, ask the class to say the split aloud (6 × 7 is 6 × 5 and 6 × 2) before checking — that is the trick they will lean on for tricky tables. Press Check on each so the class sees the beam level and the ✓.
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