Three Standard Deviations to the Left responds to the request for permission to attend field trips (old post from deeeeep in the archives) by attaching a list of all his students to this note:
Please excuse the following students from your field trips, meetings, sporting events, and excursions as they have a lesson in mathematics on Thursday, March 08. I'm sorry for the late notice, but I just couldn't pass on the opportunity.
All absences will be excused, so their work can be made up, per district guidelines. Please be willing to stay after school or come in early to help them with the work that they missed.