I guess the teacher was out of line, but if she is raising the issue AND it helps you seek out help (which I think you should), I think in the end, her coming forth to you was brave on her part. As a parent, yes it would bug me, but at the same time, I would be grateful that a teacher took the time to really notice and to reach out to me. That's just me though.
There were a lot of posts with great suggestions:
Raising Your Challenging Child classes w/ Dr. Shapiro,
the books mentioned,
this:
The Explosive Child mentioned above s a really good book to read. Also check out this website:
http://www.thinkkids.org
especially this
http://www.thinkkids.org/learn/our-collaborative-problem-solving-approach/
And this inventory of lagging thinking skills:
http://www.thinkkids.org/wp-content/uploads/2013/01/TSI_clinical-9-12.pdf
..........
All in all, I think there is a lot of reasons to be hopeful and empowered to start looking for help.