How can introductory algebra be introduced in sixth-grade mathematics classes? How can economic terms, such as discount rate and exchange, be represented? From what perspectives should interest calculation be addressed? Ernst Schuberth has developed a guide to address these questions that Waldorf teachers face in sixth-grade mathematics classes and has outlined points for lesson planning. It demonstrates how to represent economic relationships that enable students to gain a broader understanding of their social environment. From this, interest calculation, percentage calculation, and discount calculation can be developed. It leads to the abstract letter-based calculations of algebra. The book also includes many calculation examples and practice exercises. An extensive appendix on social studies fundamentals is provided.