I'm looking for some advice or tips on quickfire maths activities. Some of the children in my Y3/4 class have appalling maths knowledge i.e don't know no bonds to 10. 2, 5 10 times table etc. There is anything up 12 children who fall into this category. However at the other end there are 5-6 children who are very good all aiming for a 3a in the next half termly assessment. 3 20 minute sessions have been added to our timetable each day, session we are calling basic skills and one is for maths. However, I want to keep things fairly simple i.e. minimal writing and if at all possible all whiteboard type work. I could do with learning tables no. bonds etc but I', not sure how to cater for all of the children in my class in this way. I'm looking for something quick and punchy each day to get them involved but as I said that all can get involved in. Any ideas?