Are there any good web accessibility training courses/tutorials (online)?

I'm looking for recommendations for online courses on web accessibility. I know the actual guidelines are out there, but my aim is to find a survey of guidelines and best practices in an easy-to-parse online course or tutorial format, to avoid too much in-depth reading (time resources are constrained). I'm looking for "the" course or tutorial designers/developers would recommend to other designers/developers. Anything in between "too general/high level" and "read the manual" would be great, if it exists!

I have some training in accessibility and design, but would like to better formalize the knowledge with an aim toward implementation practices.

I found a few courses on Udemy, Udacity, Lynda, etc. but am not sure any of these are up-to-date or detailed enough. The standouts are listed below, though, if anyone who's encountered them can comment on their quality.

• Web Accessibility by Google (Udacity) - https://www.udacity.com/course/web-accessibility--ud891
• Web Accessibility: Learn Best Practices, Tools & Techniques (Udemy) - https://www.udemy.com/website-accessibility-course/

Thank you!