Differentiated Instruction with Thinkcards. This versatile set of full-color cards bridges the gap from the concrete to the symbolic with 48 meaningful and engaging activities that can be used by groups of students to study different concepts simultaneously. The set progresses through:, Patterning, Addition, Subtraction, SymmetryFor individual or small group use. The set includes 24 two-sided cards, 90 number tiles and teacher instruction leaflet. For use with standard Unifix Cubes (not included). WARNING: CHOKING HAZARD - Small parts. Not for children under 3 yrs.