The Sassmannshaus schools impress with their finely tuned structure of learning and practice content. Starting with empty pages and the simplest note values, the "Rufterz" serves as the basic interval. In the first volume (BA 9681), all fingers are used with children's songs in note values ranging from whole notes to eighth notes. Simple exercises are also texted, allowing the singing aspect to be emphasized and the melodies to be perceived as a whole. The second volume (BA 9682) offers two-part classical pieces. Dotted notes, sixteenth notes, and the first double stops are introduced, along with alternating high and low finger positions. This volume is groundbreaking with the introduction of early position playing in pieces already learned. The focus of the third part (BA 9683) is duo playing in various time signatures and keys. Familiar finger patterns and bow strokes are practiced and expanded. Finally, the fourth volume (BA 9684) extends position playing, introduces new bowing techniques, and practices these in increasingly challenging classical duos. The schools have always been a reliable guide for teachers and provide diverse material for students.