I am. The school board paid for me to do it, but I really only got certified so that I can teach the high schoolers. Here in 10th grade we get the entire class certified in CPR/AED/FIRST AID. So, the gym teacher & I got certified. The school board keeps our supplies, so we grab them when we need. We do put on a teacher class or two every year, but we get compensated for it. I'm glad I did it.
It wasn't too bad, a full day of class, then we had to be monitored teaching a full class, and then we were done. Just keep a binder with all the teaching/lesson plans, and make sure you have the supplies you need. Teaching was really not difficult. It was mostly a little bit of talking and a lot of pushing the DVD button. Then you watch the students doing the work, checking them off on each thing. Being organized for class (printing out the forms and such) was half the battle. The actual classes are not super hard.