I can comment on Pearson Course 3 (and up)-- Course 3 is a horrific mashup of concepts, without a lot of coherent framework to tie them together.

Given what my DD has seen as a tutor for this course, it's fine for GT learners, but pretty much awful for everyone else. It's ten miles wide and about half an inch deep, if that makes sense.


Schrödinger's cat walks into a bar. And doesn't.