The Teacher by Freida McFadden

Paperback - New
Fiction; Thriller
 
Lesson #1: trust no one
Eve has a good life. She gets up each day, gets a kiss from her husband Nate, and heads off to teach math at the local high school. All is as it should be. Except…
Last year, Caseham High was rocked by a scandal involving a student-teacher affair, with one student, Addie, at its center. But Eve knows there is far more to these ugly rumors than meets the eye.
Addie can't be trusted. She lies. She hurts people. She destroys lives. At least, that's what everyone says. 
But nobody knows the real Addie. Nobody knows the secrets that could destroy her. And Addie will do anything to keep it quiet.