I've seen middle schools integrate Aleks (https://www.aleks.com/ https://www.aleks.com/) online learning along with regular math classes. I don't have the data

I've seen middle schools integrate Aleks (https://www.aleks.com/ https://www.aleks.com/) online learning along with regular math classes. I don't have the data to know how successful it was at bringing the lower tail of the distribution up, but it was great for kids who were smart and motivated by the material. Some were even able to complete two years' worth of curriculum and test out of their next math class.