temper tantrum=broken glasses

I heard from SJ's paraprofessional that he had an "accident" with his glasses at recess today.  I guess the kids in his grade were only using one section of the recess area.  Of course, he wanted to use the other area.  He got mad and took off his glasses and through them.  Needless to say, they were all banged up.  SJ and his parapro took the glasses to the nurse to fix them up.  She got them back together, but the one lens was scratched up.  They were so scratched that I couldn't see out of the lens.  When I went to retrieve him and Bob from the pick-up location, he was still crying and telling me it was his teacher's fault.  I calmly tried to explain to him that is was only one person's fault (and it definitely wasn't his teachers).  I told him it was his fault.  He was the one that got mad.  He was the one who took them off of his face.  He was the one who threw them.  I told him he needs to control himself and not get so mad over such a small thing.  His temper can flare up like this when he feels that a wrong is being done.  He gets so mad that he is practically impossible to reason with.  We are trying to work on his acceptance of changes to the normal routine.  Talking him through these situations isn't always so easy.  Fortunately, the older he gets and the better his vocabulary gets, the tantrum times seem to lessen.  When my husband got home, we talked to him again about not getting mad over a change in the routine.  We also reminded him that it was his fault.  He agreed and said it was his fault.  He even apologized, but we are still going out to get him glasses tonight.