A student, or in some cases member, of a particular type of school or schooling(noun)
One who provides schooling(noun)
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Use "schooler" in a sentence
"The downside: A lousy adaptation could tarnish the book's legacy a little bit, especially if it becomes that crummy menstruation movie that every middle-schooler is forced to watch during sex ed."
"It's hard to know beause getting useful informaiton from a pre-schooler is a bit difficult."
"Robert Swift (Seattle SuperSonics) — The 7-foot high schooler is a project and played sparingly for a good team, averaging less than a point and a rebound in 16 games."