FLEX AND FLO It fits. The proven workbook concept FLEX AND FLO is flexible and easy to handle due to its clear, practical structure. FLEX AND FLO is the modern teaching resource for open, flexible mathematics instruction. In grade classes as well as in cross-grade learning groups, the use of FLEX AND FLO allows for a transition between frontal and open teaching phases. The four thematic workbooks per school year, designed to be child-friendly and understandable for all children, systematically pave the way for independent, individual work. Learning in their own ways and at their own pace. Extensive support and enrichment materials reinforce the concept of differentiation. It truly fits for every child. FLEX AND FLO ensures that the required learning objectives and competencies are achieved for each child. The thematic workbooks are clearly structured in content and encourage children to make independent mathematical discoveries. The friendly characters Flex and Flo assist in formulating discoveries through systematic support. Open and rich tasks consistently provide opportunities for working at an individual level. Integrated diagnostic and support materials provide security even in open teaching formats. Teachers can easily keep track of each child's learning progress and can provide targeted support for every child. A stop sign in the thematic workbook indicates that a learning unit is complete and a learning assessment from the diagnostic workbook can be used.