Putting myself to sleep

Normally I wouldn't complain about my classes being quiet and working so diligently. However, today I am going to complain. My classes have been working on their final exam review all morning. I have limited them to only using their own notes and brains to answer as many questions as possible during a 45 minute period. During this 45 minute period for the last 4 1/2 hours it has been nothing but silent. All I can hear is the rattling of paper while they search for their answers. Its amazing...for them. For me, its putting me to sleep. I've completed an entire review myself. Filed some papers. Written down the journal topics for next week. Written my lesson plans down into my planner. Read newspaper. Sigh...I need a nap.