Kids have to go to school early because of gas. Yes, you heard me..."gas".
Here is my explanation: Kids have to go to school at 6AM because mommy and daddy have to go to work at 7AM. Parents need to send their kids to school before work, because kids are not responsible enough to go to school on their own. Mom and dad have to go to work at 7AM, because that is when the workday starts. The workday starts at 7AM, because it started at 7AM for our ancestors. Our ancestors' workday started at 7AM, because it is easier to hunt and farm in the light, and that is when the run rises in the morning which provides the needed light. The sun is nothing but a big ball of flaming gas.
So, kids go to school early because of gas!