This Year 1 Addition and Subtraction Mistake Investigators resource includes a range of carefully designed questions that encourage children to develop their reasoning and problem-solving skills by identifying and explaining mistakes.

For each objective, there are four questions with one correct answer and three incorrect answers. Children are challenged to spot the mistake, decide which answer is correct and explain their reasoning.

The questions are designed to be answered in groups to promote discussion. The questions cover a range of objectives such as read, write and interpret mathematical statements involving addition, subtraction and equals, represent and use number bonds and related subtraction facts within 20, add and subtract 1-digit and 2-digit numbers to 20 and solving addition and subtraction one-step problems. A range of representations such as number lines, Base 10 equipment and other models are used to support.

If you're looking for something that will help your children develop their skills and help them to be more investigative learners, you're in the right place!