Information about the series: Individual Learning/Differentiation. Some children have completed all assignments, while others still need time and assistance - that's where Einstern is just right. The teaching material allows students to work independently at their own pace, consistently applying the principle of action-image-symbolism. This gives teachers the time and opportunity to provide targeted support to individual children. Topic and workbooks: In Volume 1, all topic workbooks are consumable materials. Volume 2 is available both as consumable material and as loan material with a workbook. From Volume 3 onwards, all topic workbooks are loan materials, while the workbooks for the 3rd and 4th grades can be purchased separately. Consistent in use: Structured presentations against counting calculations, prompts for collaborative action and discussion, active-discovery.