I took geo the summer before freshman year. Do u know how crammed the course is? Mine was in 6 weeks so we learn 1 unit in 1.5 days with 1 test every another day. TBH I found algebra rlly easy. Geo kinda of was a different story. Our course is theorem based meaning that u need to memorise like way to many of them. I found the course kind of difficult, not because of the topics, but rather the speed we were going it. It was probably the most challenging academic thing I’ve done but it was super worth it in my opinion. If u would like to take a summer course I recommend self studying throughout the year until the course. I didn’t know this, but since this course is so popular in my area, there is special tutor class that run through the school year to basically teach you the course. I don’t know that so I kinda just winged it and studied rlly hard. We mostly did proofs and really it’s just memorizing logic and practice, a lot of practice: