The Problem: The children had 42 Kadinsky circles to colour. On the first day, each child coloured in 14. How many left to colour? Possible solution methods: * Missing part problem e.g. 14 + ? = 42 with materials, drawing or through known facts * Missing part subtraction e.g. 42 - ? = 14 * Result unknown subtraction e.g. 42 - 14 = ? * Counting by tens e.g. 14 + 10 + 10 + 10 = 42; subtract 2 Communication Focus: Listening; Restating Students chose their own buddies as I have found this can increase engagement. Other times, students work in directed pairs/groups. I noticed: * Hundreds boards were very useful * Many students identified the number range, e.g. circling 14 and 42 on the hundreds board * Some students counted the missing numbers, with varying accuracy *As previous, some students actively co-construct and share their solution. Some do not. * Students who are working on the 0-20 number range quickly los...