Sumdog is an online practice and assessment tool that uses games-based learning to build maths fluency and improve spelling. A recent study found that using Sumdog for 30 minutes a week almost doubled children’s fluency progress. It encourages regular practice, covers key maths skills for 5-14 year olds and supports a maths mastery approach, using positive reinforcement to ensure pupils stay on task, learn more effectively, and are invested in their own success.