Check the listing for details. Hal Leonard Essential Elements for Strings - Book 2, Cello. Condition: Brand New. Listed at 14.99 USD. Begin Your Journey with Essential Technique Hal Leonard's Essential Elements for Strings series offers a solid foundation for beginning and intermediate music students looking to start their musical journey on the right foot. Essential Elements for Strings contains both popular songs and exercises specifically designed and arranged for a unison-learning classroom environment, as well as instrument-specific drills to focus students on the particular characteristics of their own instruments. The book is also complemented by Essential Elements Interactive (EEi), an engaging online music education resource. Perfect for teaching beginning string students in the classroom and at home, EEi provides a teacher-friendly set of technology tools for online pedagogy, assessment, and communication.