Description: Web accessibility refers to the inclusive practice of making websites usable by people of all abilities and disabilities. Verify a Drupal 8 issue(eg. with http://simplytest.me/project/drupal/8.x ) that "needs accessibility review". Use this research to create a simple webcast describing what web accessibility is and how to test a website for accessibility issues using a screen reader or a tool such as the WAVE toolbar: http://wave.webaim.org/ .

Deliverables: Reproduce an accessibility issue in Drupal 8 core. Comment on the issue on drupal.org to document steps to reproduce the reported issue. Create a webcast explaining what web accessibility is and how to do a website accessibility audit.

Resources: Wikipedia: http://en.wikipedia.org/wiki/Web_accessibility
There is a description of how to do accessibility testing here: https://drupal.org/contributor-tasks/accessibility-review
All you have to do though is document steps to reproduce a reported (accessibily) issue: https://drupal.org/contributor-tasks/add-steps-to-reproduce
Also check out the accessibility "core gates" for reference: https://drupal.org/core-gates#accessibility