I have a nine-year-old with dyspraxia and dyscalculia. We have begun working on multiplication facts using Multiplication Facts That Stick, and it's been very effective. I've realized as we've progressed that he could really use review in addition and subtraction, as well. I'd like to use Addition Facts That Stick and Subtraction Facts That Stick concurrent with the multiplication book. Has anyone done that? If so, do you have any advice about pacing? I would also be interested in hearing whether anyone would advise against doing all of that at the same time. We've just begun homeschooling this year, and I've identified a lot of gaps in basic math facts, so I'm trying to figure out that best (and least frustrating for him) way to help him progress. Thanks in advance for any guidance and advice you can give!