This is not a new incident if your teenage kid is having a failing grade continuously at a particular class or worse classes. This means two things. First, they are having some problem to speed dial their interest or second, they are really having some trouble to keep up with their classes. If this is a matter of laziness that have aroused from too much pressures then the parents should attend them technically. If it is a matter of that second option I mentioned then it is really a full-time job for you.
This is a sensitive issue and that is why the process to solve it also needs care. This may seem like an easy task but your careful approach should be systematic. If you are a single parent then the matter is tougher. But “Don’t give up!