"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 Workbooks provide: easy instructions to explain to children ‘Action' to make the activity more practical ‘Think' to provide extra challenge a self-assessment opportunity on every page."