Put the 14-year-olds on shift after school, put the adults on shift during the day. The teenagers won't have time to do homework but the schools aren't funded well enough to ensure a quality education anyway.
> the schools aren't funded well enough to ensure a quality education anyway
The US spends more per pupil than every other OECD country except for Luxembourg, and exceeds the average by over 50%. If US schools aren't funded well enough, essentially no one is.
Educational spending in the US is individual to the state, and even more locally within school districts within states, so it makes no sense to look at it from a national average