18 Etudes for Advanced String Orchestra Warm-ups drills specific skills in each etude. Students play in unison to develop advanced skills such as bow hold flexibility, bow control, shifting, and more. The purpose of the book is to help an orchestra transition to a more advanced level of playing by working on right hand and left technique. Each etude includes one page of practice suggestions to help students master the techniques presented in each piece.  This packet includes a 43 page book for violin, viola, cello, and string bass as well as a teacher score. 289 pages total.