Mr. Heidner teaches Computer Science classes at Tesoro High School, including AP Computer Science, Website Design, and College and Career Planning classes. Prior to teaching at Tesoro, he taught Industrial Technology at Las Flores Middle School and spent 22 years teaching instrumental music in Capistrano at all grade levels. He received his Bachelors of Art degree from California State University in Instrumental Music, and received a  Masters degree from Pepperdine University in Computer Education. He also owns his own business developing professional web sites for several education related clients . He has programmed in various languages and scripts since 1980.