Okay, that's two threads where this Idema fellow has been quoted. It may very well be true that A-Q has trained to take down schools. Wouldn't surprise me.
HOWEVER: Jack Idema (aka Keith Idema) is NOT a person whose word I would put a whole lot of faith in. He claims to be a former Special Forces soldier, and apparently have several media outlets believing him. According to people at the following link who have a personal knowledge of him, this is NOT true, and furthermore, they say he's a convicted felon. Read and judge for yourself.
http://www.socnetcentral.com/vb/showthread.php?s=&threadid=13221&highlight=IdemaThose guys must have forgotten to include training on how to register the guns as per the Brady bill. \sarcasm.