I created a free orchestra ebook during the spring of 2020.
Here's the link, it's available on the Apple Book Store (again, free)
MBRSD Orchestra Ebook, written by Steve Muise
It includes a lot of information, starting with information for orchestra students just starting out in our program, up to advanced information geared towards MS and HS orchestra members. Enjoy!
The Table of Contents includes:
Introduction
Instrument Care
Posture and Hand Position
String Names
Music Reading and the D Scale
Tuning
Playing in Tune
Key Signatures and More
Rhythm
Time Signatures
Articulation
Resources
Closing
About the Author
The free ebook is available in the Apple store, by clicking on this link