Build some work security into this. Work out with your boss ahead of time a whole schedule of classes and possible time frame. Follow Quilting 101 with Quilting 102, etc. Don't set yourself up with a class of devotees clammering for more classes and find he has hired another teacher. I would recommend that you give him a schedule of a total of no less than 6 classes - one about every month. Your value as an employee ought to really rise in his estimation as he sells more stock to your students and word of mouth brings in more students.