Looking at each school's student handbook might be helpful; our local HS has theirs publicly available online. They can answer some of the particulars, and also the wording can reveal quite a bit about the building climate.
Do they offer the option of having your DS shadow a student for a day?
Empty-nesting SAHM to DS1 (1989), DS2 (1992), and an overachieving mother (1930). Married to DH since 1986.