Hmm...if he is driving his teachers "crazy" - what do his parents say? And cmon, with wearing a hood and lisping you are going overboard - that is picking on a poor child. He may have sensitivity to light/sensory issues. Many children with sensory issues do not like bright light, get anti-social, and talk to themselves.........
I think Lorimac was mentioning all her concerns that might be frustrating the boy- lisping, etc
actually "wearing the hood" is a read flag to me too- even with my own child- it could be a sort of a hiding from the world, it could be cocoon from his insecurities, sort of like a security blanket. My son does not like his build because he is not as muscular as some of the other boys so he wears a jacket on the hottest days to hide his small frame- I have noticed it but it's his body heat and he has to deal with it although I am concerned. I have considered sending him to a teen fitness gym but I am not sure yet ........
Heh - I think that key phrase was "driving his teachers crazy"...She/he did not mention whether anything was specifically frustrating to the boy (except waiting - and that can be trained). Anyway, if the hood is technique to "hide", then it is soothing for him anyway, is it a red flag - yes, I would not require removing a hood though, but rather try to find out why he is wearing it and what is it that makes him so uncomfortable.
Teachers could try to see which days "he is worse" - it may be connected to weather, noise levels, etc.....