[akavi]

Wait, high schools starts earlier than Elementary?

I'm... dumbfounded by the idiocy of that (And a quick google indicates this isn't uncommon!).

Who on earth thought this was a good idea? Flip the ordering around and I'd bet you'd see significant improvement for practically no pain.

[shardling]

Typically it's because it's still dark out for the earlier block. Parents dislike having elementary school kids walk to school in the dark. (I have no idea whether it is actually less safe, but that's certainly the perception.)

[irishcoffee]

High school sports/after-school activities play into this timing