The »green« books of the series Mathematics for the High School were specifically designed with the math teacher in mind. Not only are they a useful resource for gaining familiarity with teaching in a Waldorf school, but they are also a source of inspiration – offering fresh perspectives and new insights into courses that have perhaps been taught many times. This book contains suggestions for lesson blocks that have put forth from a variety of experienced teachers. They cover the topics that are taught in the 10th grade in the Waldorf curriculum. The book describes the material not only in theoretical terms, but rather it offers many examples and exercises which help make the concept accessible to the students. A number of essays regarding methodology and pedagogical topics are also included for enrichment.