Unlike Rethinkyoyo, which solely focuses on 1A, CyberYo teaches a large variety of styles from 1A to 5A and beyond. The site also has a login system where you can track your progress in learning.
Spencer, the owner of CyberYo, and I are good friends and I believe there are some awesome things happening over there. Check it out, sign up, and subscribe to the CyberYo YouTube channel. It's a great resource.