Key Instant Recall Facts are introduced to the children early on in their time at Yorkswood. A new KIRF is the focus each half term. Each KIRF is designed to improve your child's mental maths skills.  Not only do they help with your child's knowledge of basic maths skills but they improve the speed in which they can perform these mental calculations.  Short tests are given to the children at the end of each half term to assess progress.