Pearl Jam - Jeremy Lyrics Meaning

I think it's about a kid named Jeremy that lives a miserable life and is neglected by his parents. Eddie, not knowing this, picks on Jeremy along with some other kids; however, Jeremy being filled with angst, fights back furiously. Eddie then later learns of the Jeremy's pain, and begins to feel bad about picking on him.
As for the chorus, I think that the line "Jeremy spoke in class today" is referring to Jeremy telling everyone else in class of his pain. But I think that it might mean something else instead. At the end of the video, Jeremy puts a gun to his mouth in front of the entire class, and commits suicide. Therefore, the line might be referring to his act of suicide in front of the entire class as "speaking in class today." Along with that, Eddie is also regretting picking on Jeremy to the point of suicide in the bridge section ("try to erase this" etc.). This is just my interpretation whether you accept it or not, but just think and consider about it.