Here is a fantastic 15 week mental maths resource for improving children's mental maths. Children work through daily mental maths challenges with adult support, peer support or independently. 6 grids per week for you to chop/cut - 4 daily practices and at the end of the week, two versions of assessments - V1 and V2 - to ensure nobody is having a peek at their partner. To monitor the speed at which children can answer questions, you may want to put a time limit on it. 6 minute mental maths. 5 min