@KrusekopfD@bethsawin EdX courses are often free to do but are sometimes limited. Some lessons might be restricted. This is a link to a certificate program and those usually cost. I do agree it might be worth the price - just don't have it in by budget at the moment!
EdX used to be a not-for-profit but it was bought by a for-profit education company. I wondered if they are going to start pushing the paid certificate courses and putting things behind a paywall.
@seanbala@KrusekopfD@KrusekopfD I checked with the organizers who confirmed it is free if you don't need a certificate. If you click on each of the four courses you can access the all of the materials directly. I know that accessibility was an important goal they had.