I saw this at https://achievethecore.org/aligned/select-math-intervention-content/
I have seen and even done some of the ones on the left; however, I am looking forward to doing more of the ones on the right systemically. It speaks to not wasting time reviewing at the start of the year (they forget anyway), not halting instruction to review (they forget the one and done anyway), not going back too far to previous grades like one step equations (sixth grade) in ninth grade, and re-teaching in the same, failed, procedural way. Instead, use a new, different, rich experience with unlearned material in the context of your grade level and/or front load upcoming content focusing on all aspects of rigor including the conceptual and the application.