1. elementary school starts at 7:30AM, middle school at 8:20, high school at 9:10 here. So, the youngest kid gets up at 6:50AM, older ones at 7:50AM, oldest at 8:40(assuming you're not too far from school that is). why the youngest ended up getting up the earliest puzzles me.
2. School is off in hot summer and cold winter, I would prefer they study on campus then, so they can enjoy longer break in spring and fall, where outdoor weather is much better to get around.