So by 11am most days they could be finished and spending time chilling out or playing with their siblings (if they have them) or reading, playing outside, being KIDS!!
And for all that read 'the real learning'!!! Being a kid, exploring their world around them, unstructured play etc etc! Active participants in their world instead of docile passive little fact reciters...oops you didn't want debate about the disadvantages of school or HS