The ACE Math curriculum is very well written and thorough, and cycles through concepts building from year to year. Some students benefit from having video lessons for the more challenging concepts. As we become aware of specific “tough spots” we are making videos. So far we have lessons for Math 7, Math 8, Algebra I and II, and Geometry. See the specific courses linked below.
Trigonometry is coming . . . a few are available now on YouTube channel