Scott D. Pierce: FX on Hulu series makes a point about teachers who prey on students — eventually

“A Teacher,” we’re told, works hard not to be salacious about a high school teacher who has sex with one of her students.But the 10-part limited series — which starts streaming Wednesday on FX on Hulu — doesn’t altogether succeed at being something other than just exploitation.(FX on Hulu is a specific section of the streaming service.)You can probably imagine how this starts. Attractive, 20-something teacher Claire (Kate Mara) takes a job at a Texas high scho