Make a cube out of straws and have a go at this practical
Reasoning about the number of matches needed to build squares that
share their sides.
How can the same pieces of the tangram make this bowl before and after it was chipped? Use the interactivity to try and work out what is going on!
Several people decided that 16 moves were needed to swap the
stars and moons. The really interesting part is the ways they
invented to tell us what the moves were ...
Primary School, Suffolk) numbered the squares 1 to 9 like this:
He says, "I could do the swap of the moons and stars in 16
School, UK) used the game-board like a map grid.
(Tattingstone School, UK) gave each square a letter and called the
Stars S1 and S2, and the Moons M1 and M2.