Interaction Design Foundation

The Interaction Design Foundation has built one of the web's most comprehensive UX curricula, covering everything from user research methods to accessibility standards to information architecture principles. The platform maintains a large community of designers and offers many courses at no cost, with paid certificate programs available for those who want structured credentialing. Courses are taught by recognized practitioners and academic researchers.

This platform works well for UX designers building systematic knowledge from fundamentals through advanced topics. It's particularly strong if you want deep dives into research and accessibility, or if you're starting out and need a clear learning path without premium pricing barriers.