Abacus is a popular Maths scheme used by thousands of schools all over the world. It fully aligns to the UK National Curriculum. Written by a team of experts, led by Series Editor, Professor Ruth Merttens. For children who are following a UK National Curriculum-based maths scheme the Master Checkpoint Workbooks provide: Short activities designed to help children check their mastery of key concepts straight after teaching.‘Have you mastered…?’ questions aim to assess mastery of the relevant learning outcome.‘Champions’ Challenge’ questions aim to assess whether some children have achieved mastery with greater depth.‘My Learning’ pages provide opportunities for children to reflect on their learning.