Temper Tantrum At School

Nathan's been having periodic temper flare ups at school.  Yesterday he hit the French teacher with a small whiteboard because he didn't want to put it away.  I suspected something had happened because he came out late and was irritable and yelling.  However, I didn't get the email from the teacher until 8pm, far too late to enact any immediate consequences.

I'm trying to decide what I should do here.  He doesn't have these kinds of outbursts at home, so I can't do any kind of correction here.  I can only try to give him examples of things he should do (the social story approach) or have consequences, assuming I find out in time.

I'm wondering if we're dealing with a transition problem (he's not getting enough warning before the next activity) or if there's something else.  School is stressful for kids at the best of times, so maybe it's just too much by the end of the day.  Most of the incidents seem to be happening later in the day from what I'm hearing.

The teacher clearly doesn't have the time or energy to keep me up to date, so I can't depend on proactive methods from her. 

I'd like to sit down with the teacher and the floating aide and talk about ideas but I'd like to have some ideas before we sit down. 

I'm also wondering if this is something other parents are having to deal with and this is in the normal range of behaviour for seven year olds.  Certainly I've seen that Nathan's friends are still prone to the occasional tantrum.  It doesn't make it acceptable but it would make me feel better.