The Cheating Pact (2013)

Under pressure from their parents to get into good colleges, high-schoolers Heather, Kylie, and Jordan convince a shy but very smart girl, Meredith, to take the College Entrance Test for them. After Meredith gets a low score on one of the tests, she winds up dead in a mysterious accident, and all three teens are suspects in her murder. Heather discovers that the other two are framing her for Meredith's murder, and she teams up with her mother Brenda to prove her innocence.