Offered as a service from the WebAIM website, Maine CITE provides the following “tip” on how to make your website more accessible to all people.
ARIA Design Patterns
The unfortunate reality is that ARIA is often implemented incorrectly. This can easily make accessibility much worse. The WAI-ARIA Authoring Practices 1.1 provides practical guidance for implementing ARIA correctly. The Design Patterns section gives clear instructions and examples for a wide variety of application widgets.
See also information about how you can subscribe to the monthly WebAIM Newsletter which contains lots of great information about web accessibility.