Most middle and high school-aged students, as well as their parents and teachers, know the struggle of class sizes that are just too large for them to get enough individual attention. Not at Fusion Academy. The accredited private middle and high school (grades 6-12) — which has locations around the U.S but still maintains its flagship campus in Solana Beach at 512 Via de la Valle — has a take on class sizes that is, quite literally, unique.