Mrs. Gilchrist was Ben's high school biology teacher. Bonnie and Ben both needed to retake the biology final in order to graduate from high school. Sarah and Ben kissed before the test and when Bonnie steals the answer key assumed she Ben seduced her so he could steal it. Ben got 69% which she concluded he didn't cheat. They start dating, but shortly after he realizes that she is clingy and a hot mess. Ben and Riley ban together to get Ross and Sarah to break up with them. Sarah and Ross end up getting together.