I am a Teacher: Super Mario no Sweater is a Family Computer Disk System game released on August 27, 1986 only in Japan. It was designed to be a sewing simulator. Players would input their measurement sizes and design sweaters, adding pictures of famous characters such as Mario, Luigi, Peach and Bowser in the process. It was devised by Royal Industries Co. Ltd., a Japanese appliance and sewing machine company. It is the first of two Mario sewing games, the other being Mario Family on the Game Boy Color.