The Almost Fun website has some nice interactive teaching resources for a variety of topics. This non-profit has a goal of providing culturally-responsive learning resources for diverse students that will engage them in learning about math. In addition to the Math Lessons: https://www.almostfun.org/lessons , they provide resources for teachers like Lesson Templates https://www.almostfun.org/for-teachers . This would be a good way to provide additional resources when students struggle with certain concepts.

In addition to their Math lessons, they provide SAT Test Prep for all 3 subjects: https://www.almostfun.org/app/profile?s=reading

You might also want to check out their College guides: https://www.almostfun.org/guides

You’ll notice that some of their lessons, especially the more advanced topics, are still under construction, so you might want to visit back if they don’t have what you need.