Our school district had us out at 2 on Wednesdays in elementary school, 2:30 in middle school and in high school we just get out normally at 2:50, but the elementary/middle schools standardly ended at 3. What's with this early-on-Wednesday system, and where did it originate from? Nobody here was able to tell me.
Note: when I lived in Harlem, this never happened. On moving to Westchester, it did. That's part of the reason I've always been so confused about it.