Before the curse was broken Mary Margaret was Henry's school teacher .Now the curse is broken is she still teaching??

I don't think she would've went back. There would've been other teachers there, and plus she went through the portal with Emma and was away for a while.

I don't think she was. She was too busy being an Icon for her people. I think that when the curse broke she started to be considered Von everyone as ruler again so it would have been a bit strange if she would have still spent her time on her "curse-job". There were probably other teachers that could replace her, though:)