The top 4 most common pets have finally been named! The results are surprising. Delphian School is an independent, coeducational day and boarding school located in Sheridan, Oregon open to students from around the world. We offer a rigorous academic independent-study program, with a strong emphasis on practical learning, for primary through high school students. Delphian also offers a highly regarded English-as-a-Second-Language program and boasts a diverse, international student body representing over eighteen countries.