On https://www.duolingo.com/skill/fr/Verbs%3A-%C3%8Atre-_-Avoir, it refers to the Passé Composé. What is the Passé Composé unit?
Exactly what I was looking for. As I go through the tree, I've been adding the Tips to a OneNote notebook. When I hit a reference to another page, I insert a link to that other page. (Which will be blank until I actually get to that unit.)