To get the children thinking mathematically first thing in the morning, I write a number on the board. It can be any number depending on the children’s abilities.
Then I ask them to tell me about the number, e.g. if the number was 12, they could tell me that 6×2=12 or it has 1 ten and 2 units etc…
Continue until they have run out of ideas. This is an excellent starter or filler.