Complex sentence: Required physical education classes are held in the afternoon with each student participating in 1 hour of supervised physical activity twice a week, and fine arts classes (two semesters are required for graduation) are held in the evenings.
Split into simpler sentences: Required physical education classes are held in the afternoon with each student participating in 45 minutes of supervised physical activity twice a week. Fine arts classes (two semesters are required for graduation) are also held in the evenings.