Your friend is having trouble in school.
Some things that i would try to do to help out a friend that is having trouble at school is to figure out there priorities. Are they spending time on their homework or are they not even doing it. I personally believe that it is impossible to pass a class without doing homework. Even if you ace every test. By analyzing their problems you could easily work from there. all you would have to do is to sit them down and do not let up until their work is completed to a satasfactory level. then as a friend you should check this over.