In this landing page's submenu, you'll find four hands-on accessibility exercise pages with WCAG and best practices errors coded intentionally onto them. Each exercise pages features several "Problems" you must identify using that page's designated testing technique. For example: when doing the Keyboard exercise, you can only use the keyboard to test the page's accessibility. It's a good place to apply what you learned and get a feel for the issues that disabled users deal with every day.