Just got done teaching a class of fifth- and sixth-graders at our Christian school. Our regular teacher had to bow out for a family commitment, so I got asked about 25 minutes before class started! Not much time to prepare, but it still went well. We talked about 1 Peter 1:14-16, and what it means to live "holy" lives for God.
Funniest thing about that mixed class is that there are just 2 boys, so quite a bit of talking amongst friends. Would I want to teach them day in and day out? Let's just say my appreciation for our teachers increased significantly in the last hour!