D'addario CORE how-to videos. Liz Benoit from D'Addario and Diana Ladio from The Moxie Strings give instruction on how to string a violin, viola, cello or string bass AND how to tune a violin and viola.
STRINGS Magazine is a site with articles for students and professionals. "How to" improve on a specific skill, an "up close and personal" story, music reviews, new instruments to check, and some of the latest information about professional musicians can be found on this website.
Classics for Kids is a kid-friendly site giving information about composers throughout history. There are videos and opportunities for students to learn about these composers.
Meyer Music Store website offers students access to their products and services. This is an excellent store from which to rent-to-own instruments with family-friendly prices and excellent customer support.