First Doctors, Now Teachers - I'm having a week of it!

you should lodge a complaint with to the authorities. the teacher should have told you what was thrown from the start. what if the injuries weren't just superficial? the parents of the kid that threw the chair should be made to pay the medical bills.

Yes they should have called you. It can be hard for parents to talk to a teacher because as we were young we were taught that people like teachers in authority are not to be questioned. When you go in don't think of this person as a teacher but as your equal which they are. I have also found that fewer words can make them a bit more nervous then getting carried away. I would walk in with your child and say "Would you like to explain this to me?" Give that look you would your child if they broke your favorite vase. After the teacher tells you the story and provided she has told you everything then say "Now will you explain to me why I was not called when it is clear my child was injured?" Make sure to continue "the look" At this point you will have teacher that realizes they messed up big time and that you will not tolerate it. When she is finished be blunt and say "if my child is injured in your care I expect to receive a call and I will not tolerate this again." I promise it will never happen again. I really have a concern that with a bump on his head no one checked it out. Keep an eye on things and remember you have the right to have expectations of your child's safety!