Any stories with content that fits into these categories? The characters have to be students or of a younger audience. I tried Google search and most stories that turned up were crap, so please help me if you can.
What you are looking for skirts a really tight issue. Mistress Laurel and Manu Manu the Slender (the owners of the art house that is Literotica.com) have a rule about depicting sex between people under the age of 18. While they do allow for characters to be seniors in high school, anything below that pushes their buttons. (More about this can be found up in the FAQs if you are interested.)
More often than not, writers get around the potential issues by having the characters "in college", but somehow facing precisely what would be encountered in high school right down to class schedules and so forth. So, if you relax some of your search criteria to include "college", you may find what you are looking for.
Having said that, several of us do press against that boundary by working the characters as Seniors in High School and barely eighteen. My own singular submission under this pen name for example (which I don't recommend). JimBob44 is the only other person I can think of by name that has several high school set stories, specifically "Oddball" and "The Broussard Sisters" series.
You might try checking out some of the top lists in First Time or Romance categories. Sorry I can't be more specific at the moment, but if a particular one occurs to me, I'll try to remember to pop back by.