the school inserted five weeks of a modified block schedule called "Superblock." On Mondays and Tuesdays, students have 3 periods a day, each being two hours long. On Wednesdays and Thursdays, students still have 3 periods, but they are only an hour-and-a-half long and students are released early on these days. Friday follows the normal 6 period day. This schedule is used to accommodate state-mandated testing, such as the Minnesota Comprehensive Assessments (MCAs) and MAP exams. Class sizes 1978 – 898 1990 – 432 1994 – 402 2011 – 401 2015 – 420 2016 – 360 References External links Jefferson High School Website Bloomington Public Schools Official Website Buildings and structures in Bloomington, Minnesota Educational institutions established in 1970 1970 establishments in Minnesota High schools in Bloomington, Minnesota Public high schools in Minnesota