I've taught kids to sew. You can give an over view to a larger group but if you don't have help from others who sew I wouldn't have more than 2 (ages 9-12)of the younger ones to teach at a time maybe 3-5 at a time of the older ones, after age 16 and up you could handle a larger group. I have taught up to 12 troubled teenagers at a time but there was some adults to help supervise even though they couldn't sew they helped to keep control. It did require a lot of patience.