If my son is not doing well in school, I want to know about it so that I can try and either do something to correct the problem, or to help my son however I can. If I don't hear anything then I am going to assume that all is well and that there is nothing to worry about. As a teacher myself, I know how much there is to do and the last thing I would want to do is become a nuisance to another teacher. It is like we are all performing a dance with intricate steps and yet no one really knows how the dance should be performed. Strangle analogy, I know, but there you have it.
Parents feel a new appreciation for the commitment and skill of teachers.
Schools are able to access a variety of resources from parents.