Abacus Evolve Challenge Key Stage 2 Easy Buy Pack with IPlanner Online - Abacus Evolve Framework Edition Challenge Author:Adrian Pinel, Jeni Pinel, Carol Richardson, Jon Kurta Abacus Evolve Challenge is perfect for ensuring more able children are being stretched to reach their full potential in maths. Challenge contains a range of enrichment and extension activities with a fourth level of differentiation above that found in other programmes.