Good afternoon, I have a bit of a free day tomorrow as a lot of my class are out and I am left with most of my top group Y4s in maths - those aiming for 4b and 4a at end of year. I really want to treat those who are capable with a some focused maths work that is really challenging for them, anything really, I just want to see them get really stuck in. Does anyone have any good ideas for short activities? Not necessarily a lesson as I will just sit with a group and we will talk and I will lead the activity. Any help would be much appreciated, thank you.!