You omitted:
- Use the Block system.
- Use the Module system.*
However, it takes experience to do such things well. I will concur that many districts dabbled with alternative schedules without fully understanding how to do so effectively. I think a lot of schools came up short. Such deficiencies are more noticeable in math than other areas, because of the cumulative nature of the courses: you use everything you’ve learned from “birth until present”.
I concur with a previous poster who observed that @vballa wrote about watching videos, but not working through problems. I am a firm believer that in order to understand basic math, you have to do problems. Look at the stated problem, try to figure it out, then check the video to see if they get the same answer.
The class may also be faster paced than they are used to.
*My high school used the module system. At the time, it was 8 modules, 4 1/2 weeks, 3 academic blocks per module, 1.5 hours of instruction per block, 5 days a week. Algebra II was 4 mods, Geometry 3 mods, so in theory it was possible. No advisor would approve that, because then you’d be short of credits in another area. AB Calculus was 2 mods, double blocks. One of my classmates brought a cot to class, the better to absorb the information - he seemed to do fine when he went to MIT.