Tedd grew up with three brothers. His family lived on a farm in Pennsylvania for several years then returned to Elmira until Tedd was ten years old. His father's work then required that they move to Gainesville, Florida. There, Tedd's first art lessons in an abandoned dentist's office over the Happy Hour pool hall eventually led to a fine arts degree from the University of Florida.

He and his wife, Carol, started their family in Tallahassee where Tedd worked as a commercial illustrator. Carol, a kindergarten teacher, drew Tedd's attention to children's books. Their first son, Walter, inspired his breakthrough picture book, NO JUMPING ON THE BED!.

He and his family now live in Elmira. His second son, William, now stars in NO MORE WATER IN THE TUB!, a sequel to his first book. He has now published over 50 books as author and illustrator.