HTML and CSS resources - cogeorg/teaching GitHub Wiki
During the course, we'll explore aspects of front-end development. For this, you'll be expected to have a basic familiarity with the structure of HTML and CSS. To this end, simply completing the two free online course below will suffice:
In addition, Oliver James has a great resource, HTML & CSS is hard (but is doesn't have to be), which is more thorough in explaining all of the crucial concepts. Last, but certainly not least, w3schools, is the go-to resource for front-end development.