The Wohlfahrt Op. 45 Studies are a mainstay of violin and viola study. Book 1 

Introducing the Positions, Volume 1, is the beginning of a course of study started in position playing.

Alfred's Essentials of Music Theory is designed for students of any age, whether listeners or performers, who want to have a better understanding of the language of music.

Beautiful Music for Two String Instruments- Book 1 is arranged for  two violin, two violas, two cellos or two basses.

Composed by Samuel Applebaum. Duet or Duo; Solo Small Ensembles; String Orchestra Method/Supplement. Book. 32 pages. 

Duets for All enables any two instruments to play duets. Not only may two like-instruments such as two flutes play together, but two dissimilar instruments such as violin and tuba may perform all of the duets.

Dotzauer Exercises for Violincello Book 1 is an incredible exercise book for cellists. It is a classic and fundamental for all serious cello students. A must have!

The Wohlfahrt 60 Studies Op. 45 Volume 1 and 2 are a mainstay of violin study. 

Expressive Technique for String Orchestra-Viola, Cello, & Bass available

Klengel Technical Studies for Cello are Great technical exercises for the high school cello student! Volume 1 covers scales and arpeggios in two, three, and four octaves. The scales are also presented in broken thirds, and with multiple bowing patterns for well-rounded practice. This item is a Schirmer edition

Mazas forty selected studies consist of technical methods for young violin students. 

Solos for Young Violist is a graded series of works ranging from elementary to advanced levels representing an exciting variety of styles and techniques

Solos for Young Violinist  is a graded series of works ranging from elementary to advanced levels representing an exciting variety of styles and techniques for violinists