Professor , I will not be here for our next class meeting .   Is this absolutely necessary ?   I tried to work something out , but I really do have to miss one class .   Will you be able to make up the work you missed ?   I'm going to be doing a lot of extra reading .   Remember that I will only let you miss one class meeting per semester .   Yes , I remember .   Could you e-mail me this week as a reminder ?   Sure , no problem .   Make good use of that day off ; you'll only have one this semester ! 