'Amazing Mug trick' homework example

A good homework is ask them to do a simple practical at home for their parents. Obviously you have to be careful here – I use the Amazing Mug trick to demonstrate refraction for year 8s. Put a coin in the bottom far side of a mug and move your head so the coin is just out of view. Pouring water in causes the coin to appear as if by magic. Students have to demonstrate this to parents/siblings who sign a slip in their books to prove that it was done! This type of homework can also use internet simulations as the second worksheet shows.