The two courses are well-structured. Each course has an overall outline listing each lesson, and each lesson has a table of contents to overview the topics therein. The courses highlight major key topics in technical writing and does so with easy-to-internalize (tenets). I'd have loved for my university coursework to be so clearly organized.
Some highlights include defining your audience[1], engaging your audience[2] and reviewing how short and clear sentences improve comprehension[3].
1: https://developers.google.com/tech-writing/one/audience#defi...
2: https://developers.google.com/tech-writing/one/active-voice
3: https://developers.google.com/tech-writing/one/short-sentenc...