Below are a variety of resources that I hope that you will find useful. Hopefully my fellow teachers will find these to be easily accessible and understandable. These are all concepts and exercises that I have used with my own pre-college students over the past 25 years, and have also found lots of these to be really useful to comeback players.
Please do get in touch if you have any questions or would like any further information. I also offer online lessons, information on which is available on my Lessons page.