Using co-operative learning strategies I set up these 4 stations for pupils to rotate round. The fourth can be found on tes: Discovering-Pi-and-Circumference-Activities (the red/amber/green worksheets).
For the playing cards activity: give pupils pack of cards and they can deal out cards/cut the deck/etc. and then answer the corresponding question on the sheet.
The ‘connect thoughts’ task is adapted from another tes resource.