Mrs. Rayburn was the principal at Grant Avenue Elementary School. On occasion she acted as substitute teacher for Miss Landers specifically in "Mother's Day Composition" and in "Beaver's IQ" and in "Beaver And Poncho" we find that she was once June Cleaver's teacher.
She made her first appearance in "Beaver Gets 'Spelled" and she is last seen in "Beaver's Graduation." In "Her Idol" she sends Beaver home with a letter after Beaver calls Linda Dennison a "smelly old ape" and then punches Larry Mondello in the belly. She gives Beaver the orchid that she received at a 25th anniversary party for being in the teacher business to help out Wally in "Wally's Orchid."