the kids with the "lowest" grades were generally not present, unless we're talking about "lowest grade but still actually graduating" which was probably similar. the struggling households put pressure on teenagers to work and provide household income, and that makes the 6-8 hours of schooling wasted time. all the "truant" kids I knew had jobs.

but what used to really drive me nuts as a kid is that the valedictorian was always a safe selection. there was always an "out" for the high achieving student who didn't want the title so it could be passed off to a career-oriented striver... the one who would deliver a message administration liked and not make waves or use the platform to make a statement.

looking back it was a very instructive lesson in how institutional power is deployed to steer people into acting in support of it.