Mr. Avery is an elementary school teacher in St. Canard.
Avery's choice of career is that of elementary school teacher. Both Gosalyn Mallard and Honker Muddlefoot receive lessons from him.
Mr. Avery likes to see his pupils do their best, unless that best creates dangerous situations.
There is nothing known about what Mr. Avery looks like.
Gosalyn Mallard wants her and Honker's science project to involve giant squids and plutonium. Mr. Avery doesn't give it his approval, so they resort to a project about plants. The Incredible Bulk