OK.

[divapixie25]

Look, I get that the schedule is all jacked up because of activities.  I get that.  I understand that we may need to juggle things around a bit to accomodate that.  I get it.  BUT... I do NOT appreciate being told 10 minutes before you come to my class that you are bringing twice as many kids unannounced because you decided to combine my classes without consulting me.  SURE, it's fine but you overstepped the professional boundaries and left me to figure out what on earth to do with twice as many kids with only 10 minutes of prep time.
DAMMIT!  KNOCK IT OFF!