I asked this question today.
Essentially, I am trying to collect some more lesson plans of a certain type: "Desmos Make-A-Graph" projects. And I invite others to contribute to this collection.
I am a little worried only because it's a big list question and doesn't have a right answer and that can be met with some animosity (at least on Math.SE). If there is a more appropriate place to do this then I would love to know about it. I wonder if I can get desmos to contribute to the project.