Whats the Movie that start with an "M"?

Theres this movie I saw a long time ago. The movie starts of with a couple with one boy bringing a new daughter. They put the daughter in the trunk. The daughters name start with an M. The movies is about this girl. Her parents are really mean to her. The girl who make breakfast by herself, go to the library alot. In the end of the movie she gets adopted by her teacher who noticed that she was really smart. The girls mom is very tall while her dad is short. Does anybody no the name? I really lke the movie. Thanks!