- Part of the Abacus toolkit, the textbooks provide: - the perfect balance of practice and problem-solving for each area of maths;- pictorial representations to support children"s conceptual understanding;- clearly laid out questions with instructions that are easy to follow;- a self-assessment opportunity on every page;- colour to indicate the different maths areas within the programme. Series Editor: Ruth Merttens Authors: Jennie Kerwin and Hilda Mertten.