I'm not exactly sure whether this is supposed to be bitter or not, but following either course it's still written in an intriguing way. You have a good scope of imagery.

I love the line, He stroked the chalk like it was sex. It inspires a lot of vivid imagery, but I have to say that the poem got a little confusing near the end.

Woah... crazy images. "He stroked chalk like it was sex." Perfection, there. Brilliant way to put it. I also loved "And then I ask him. Teacher..., why are you smiling? I'm only learning" Fantastic. I liked the format a lot, too. It did slightly creep me out because it was so sinister, but it was sexy at the same time, and written beautifully, so I adore it. Awesome work, never stop writing.