The W3C's own free course on digital accessibility: who it affects, the business case and the principles behind WCAG.
Paid certificateDesign & UX
18 hrsBeginner
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UC Berkeley course on the roots of a happy, meaningful life, with weekly happiness practices.
Paid certificateHealth & PsychologySelf-pacedBeginnerHarvard Online
Calculus Applied!
Case studies showing how calculus models real problems in economics, medicine and more.
Paid certificateMathematics45 hrsIntermediate