It totally depends what you want to teach. I really enjoy teaching very beginning quilters to do a sampler quilt.
My first class we discussed fabric and fabric choices. I showed samples and discussed contrast. We actually chose our fabrics during this class. It was really good for students to have everyone else's input. I also discussed and showed the tools required, but I am talking about total beginners.
For homework, I had them wash, dry and press their fabrics.
The beginning of class two I taught them the ins and outs of cutting with a rotary cutter and we cut the first block. I had samples of each and each piece cut and we proceeded from there. I also had them test their 1/4 inch seams before sewing the first block. We usually made two blocks during each lesson, because it was an evening class.
I didn't sew with them because I wanted to be able to monitor their progress and help as needed. I taught elementary school for 20 years so I may be a little anal about giving all of the information I can.
After completing all twelve blocks. I taught them how to complete the top.