Hi! I have an interview next Tuesday and have to prepare a 20 minute maths lesson for a year 3 class. I was thinking of doing something to do with problem solving, and thought about this as a possible idea: Giving the children a scenario where 2 children find a bingo game, and want to play, but can only find the numbers 1-5. They decide to try and make as many of the other numbers as they can, using the numbers they have, and addition, subtraction, multiplication and division. Children in pairs then have to try and work out which numbers they can make. Can anyone give me any advice on this idea - would it be suitable for year 3, and is it do-able in 20 mins?! Thanks!