Numicon locks – this is a super practical idea which has lots of scope. Basically the pupils can match the key to the corresponding lock. The lock also has the number of dots drawn on it so the children can see it in lots of different ways. It can also be used for multiplication – the five red numicon pieces equal the two blue numicon ten pieces. The keys at the bottom can correspond with an answer in the lock in numicon. For example ‘1 more than 8’ can correspond to a lock with nine on it which also can improve the pupil’s use of mathematical language.