High School High

It's right there in the title

High school math for the win!

The school is basically on a hellmouth

Thankfully he ages up halfway through

Sometimes you gotta get married to keep from getting kicked out of school

She just wants to try to be a normal teacher without this crazy kid complicating her life

Fame! - K-pop style

If you find yourself 18 again, you're obviously going to try to relive your high school glory days

Disaffected youth pursuing their dreams - not that they even know what those are just yet

Kids these days will never know the agony of accidentally taping over something or getting kicked off the internet for a phone call

Middle School/High School, same diff really

Different sort of drama in high school the second time around

Unfortunately the high school side plot is bogged down by terrible bullies who don't get nearly the comeuppance they deserve 

Trying to blend in at the crossroads of all the murders

Not sure these guys ever actually go to class, but at least their band is great!

Trip back in time #1 - Sol and Sun Jae in high school

25% of the club is in high school, so there's definitely revenge happening there

Try to get the students the grades or try to get the students to learn?