Mr. Tuttle is an enthusiastic, overweight music teacher (perhaps a foil for the thin, dour Mr. Dewey). He is well-liked by the students but had a mutually unfriendly relationship with Mr. Belding, stemming largely from Tuttle having been runner-up to Belding when Bayside had chosen a new principal. He also served as a leader in the local teacher's union, a driver's education teacher, and a music teacher.