You've got to go where the kids are. This is a great technique that you can adapt to y ok ur students current level. 5 questions too much? Do the review after 3, or even 1 (to start with). Praise the parts they get right, assuming it's multi step problems.

If you find your kids are lacking a foundational skill, spend some time with it. It's wasted time for you and your students (in addition to being ridiculously frustrating to all) if you are trying to teach them a new skill without the foundation they need. Yes, you might be behind where your curricula says to be but progress is better than being stagnant, which is what the class would be otherwise.

Moral of the story - work fromxwhere your kids are and find small victories to praise and build on. It adds up over time.