https://testingaccessibility.com/

Comprehensive Accessibility Training for Shipping High-Quality Web Applications A self-paced workshop designed to teach you the principles and effective patterns of accessibility, from design to deployment.

If your applications aren’t usable by people with disabilities, your job isn’t done.  It is your responsibility to deliver high-quality applications that work as expected for as many users as possible.  There is no magic wand that you can wave and create accessible applications.  There is no single tool that will make these challenges go away.  To build accessible applications, your team needs to make accessibility a priority.  Most importantly, your team needs to acquire an accessibility mindset shift.