I'm preparing myself to eventually teach programming using this book as the foundation, by reading it end to end. So I wonder if a document aimed to instructors exists.
We used to run workshop on teaching with precisely this material for high school and college level instructors.
While we no longer support college-level instructors this way, the Bootstrap Algebra 1 course is for K-12 teachers.
Based on what you wrote, you seem to be a college-level instructor. K-12 rarely goes thru the whole book. So I
propose you pose questions here, and one of the authors will reply quickly.