if the Admin. has no plan or policies established to deal with behavioral problems, can't your wife ask the union what to do?
the sad thing is the kid is a kid and needs intervention and counseling while he is young, or sometimes just some good old fashioned positive and reinforcement and neg. consequences...now is the best time for him to get support services and learn appropriate ways to deal with frustration.....has your wife not mentioned the behavior to the parents?
Usually the teachers I see at those grade levels will discuss behavioral issues with the parents first.
my daughter's school has a behavior signal for each day
green...good, respectful, followed directions
yellow...needed repeated correcting
red...buzzzzzzzzzzzzzzzzzz
indiv. kid changes his/her own pen/stamp color to yellow when he's "off the mark" so to speak
then can earn his way back to the green pen
but if he continues poor behavior or gets worse or is physically acting up.....he gets the red pen
kids (with the exception of physical outbursts in early grades--anything that could cause harm is red and stays red), can earn their way back from red by the end of the day
the kids get their pen and give it to the teacher at the end of the day to mark the book so the parent knows how the behavior was for the day...each week has a sheet with five spots for markers and parent signatures
if the kid gets a bunch of yellows or reds, the parents see the pattern...each parent has to sign the marker page each day
several reds and a meeting is called with the parents
not sure if this helps any or makes sense