Thank you for responding..
I did discuss it with the teacher when I collected him, who told me that I should not react in front of my son (reacting in such: shame my boy are you ok, that looks really sore) teacher told me that he is a strong boy, and he is fine..
I took him to the dr, and when I got back home went past the school and spoke to the headmistress, who then told me she had no knowledge of the incident, and that this teacher already has warnings against her, and that she is waiting for complaints re the teacher so she can give it to the 'board' so that action can be taken. She also is aware that once a parent complains about the teacher, she knows the teacher victimises the children afterwards, and I am completely outraged that the headmistress knows this and does nothing!
The school is now closed for the holidays, so I'll have to patiently wait for the 11th April to have a meeting with the teacher and principle.
At this point in time I feel like taking my child out of the school for the rest of the year and starting grade R in a new school..
Sorry for the long post.