I did the same things your daughter is doing when i was a teen myself. I skipped school a couple times and told some lies to my parents about where I was...oh man! i'll tell ya what really works...take the CAR and or the car privilidges ! teens should be allowed to have relationships with whom they choose as long as they are healthy relationships. most teens are gonna skip class, practice , whatever. i wouldn't blame it on the boyfriend, i would blame it on her, because she makes her own decisions to do these things she's doing. take my advice, TAKE THE CAR for a while! they HATE that! (if she has a phone, i'd take that too for a little while) when grades start improving, and she is being honest with you about things, gradually give back privlidges. worked for me!! i wish you the best, and please know i have an upcoming pre-teen daughter myself and i'm ready and waiting for anything she may pull on me!