This is an interesting idea... Under "let's practice", I wonder if being able to respond to each of the list items separately (without waiting for the "Break it down..." button) would make the practice part more engaging? Also these would be awesome as something you could -listen to- instead of just read. I feel like I could use some mental models while I go on a walk or something. Lastly, I found the emoji's distracting and wished that I could scan through the text a little more efficiently (maybe just needs some formatting). Otherwise, this is a really cool idea. Upvote.