One of the changes I've noticed since my own time in school is the prevalence of parents.  My initial thought with parents was that I would have to deal with them when they're mad that their little angel did poorly.  However, in observations, I have seen several instances of the teachers calling a parent in the middle of the day.  Since this appears to be something I'll have to figure out, what are your thoughts?  Are there certain actions that would require calling a parent?  Or perhaps grade-wise?  And what about calling parents over positive things? How much is too much/little?