Is this a student who just feels like their idea won't be heard if they don't say it "RIGHT NOW"? I had a student like that and ignoring it, telling them that this was time to listen, etc. did not work. What I ended up doing was giving this child a sheet of notebook paper. I told him that if something occurred to him or he had a question to write it down and I'd get to it after we started working and I was walking around. This worked like a charm because it was work to jot down all those extraneous comments and we were left with only questions and things directly related to the lesson. Also, when I looked at that if there was something that would benefit the whole class I could call everyone's attention to it. Maybe it's just a matter of giving your kiddo a way to focus.
