Parents tell me horror stories of hours of homework in third grade, of fighting their children to get it done when they are already exhausted from school and a myriad of structured activities, of it taking three times as long because the children just can't handle anymore work or structure.
I obviously can't speak for other school districts in other cities and other states, but my son's school is nothing like this. The only homework they get is spelling. Plus - the "myriad of structured activities" are nothing to do with the school, surely ? My son attends Cub Scouts, swimming lessons, and soccer - but none of them are through the school. Surely if the child doesn't have time to do his homework, it's the fault of the parents, not the school.
I have to admit I'm a bit ignorant as to what the exact definition of a charter school is - but on the subject of discrimination, I know a child who is deaf, and was not accepted into our state school for the deaf (which his dad had attended when he was in school)- because he also has cerebral palsy.