One word of caution. How much fabric can u use.....notice I didn't say want. My sister and her quilt group did work for fabric from a fabric company and they very quickly said stop stop stop....."we have more than we can ever use". While it sounds really good there can be a downsize. Find out what fabric you can get for the work. Is it on sale fabric or latest arrival. The most expensive or......and how much per hour of work. If you get the equivalent of minimum wage and the minimum is say.....$6.oo per hr and you work 6 hrs. that is $36.00 of fabric and you work 3 days a week.......do the math before you agree.
Also get an agreement for time of teaching. How will the class fee be divided. Again, at a per hour rate. This is similar to bartering...Also, what are your state's tax laws about this type of work. Be careful and get all the details before you start.