As I noticed in my other thread, a lot of people don't know how to cook. That is a necessity, to me at least, for life and should be a required class in high school (at least a basics course). Another one that should be taught all the way until graduation is vocabulary/grammar, as you see plenty of people nowadays with horrible grammar/vocabulary (the internet doesn't help).

What other classes do you think should be taught in school/high school?

Yeah, a foreign language in today's society is pretty much required, but 4 classes would put it at probably 9-12th grades (unless they start younger).

Facebook 101 and 102.

Etiquette. Kids these days have no fucking clue what manners are.

A lot of adults, too.

Whatever the hell happened to treating others the same way you want to be treated?

Pimp-ology. Pimpin' ain't easy. With the right teacher, it can be.

Absolutely this.

Logical thinking and reading with understanding.

Etiquette, cooking, and grammar!! The world needs a LOT more of these!!

Nutrition.