The Sassmannshaus schools impress with their finely tuned structure of learning and practice content. After starting with blank pages and the simplest note values, the "Rufterz" serves as the basic interval. In the first volume, all fingers are used with children's songs in note values ranging from whole notes to eighth notes. Simple exercises are also set to text, allowing for a focus on the singing aspect and enabling the melodies to be perceived as a whole. The second volume 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 that have already been learned. The focus of the third part is on duo playing in various time signatures and keys. Familiar finger patterns and bow strokes are practiced and expanded. Finally, the fourth volume expands position playing, introduces new bowing styles, and practices these in increasingly challenging classical duos. The schools have always been a reliable guide for teachers and provide a wealth of material for students.