What don’t you understand about this?
High school is four years, when I attended there were three terms for a total of 12 terms.
There were seven periods in each day, and you likely took a class during each period, wether it was math, English, History, Science, Art, Shop, PE or Shop to name many.
If I recall correctly you needed 80 passing credits to graduate, out of a possible available 84.
I took 12 credits of Math (four years) and 21 credits of science (seven years).
I never took an Art class but lots of English, History and the like.
Three were lots of classes that losers took to get easy grades...
“...then I must have been in HS for 100 years.”
Seems like I’ve been trying to ‘splain this to you for a hundred years...
You wrote “In HS I took 7 years of science classes and every math class I could.”
That sure sounds like you spend 7 years in high school. Years of HS is a lot different than the credits you took.
Rather testy on a Friday afternoon, BB. Go have a beer.