Information about the series: Clear structure in each chapter: activate - build - secure. Activate prior knowledge in "Your Foundation." Secure the built knowledge in "Check Your New Foundation." Understandable examples with solutions. Students can follow standard tasks step by step using the basic examples with detailed solutions. Learn independently. Students can self-check through additional solutions in the appendix to "Your Foundation" and "Check Your New Foundation." Tasks for everyone. Differentiate with the wide range of basic tasks and advanced tasks. Use entry points, stumbling blocks, and outlooks for each topic. Basic tasks are clearly assigned thematically and cater to the foundational level. Advanced tasks connect the topics and address higher levels. Inspire with mathematics.