nerdi
Crystal Caverns
Bramble the mole miner needs help: the crystal caves have gone dark, and crystals only glow in perfect equal groups. Children fill mine carts, plant crystal arrays, share crystals fairly with the pebble folk and ride the mine cart from cave to cave as each one blazes back to light.
ages 7–10 · about 15 min
What you'll learn
- Multiplication as equal groups and arrays
- Times tables from 2 to 10
- Turning an array around gives the same answer
- Division as sharing and as grouping
- How multiplication and division are linked