Main Contact for Adult School: Yolanda Sanchez Phone: 530-926-0425 Fax: 530-926-0586 Email: Physical Address: 720 Rockfellow Dr. Mt Shasta, CA. 96067 Website: Short description (or list) of services: Siskiyou Union High School District, or "South Siskiyou Adult School" provides an opportunity for students to earn their Adult School Diploma. In addition materials are available for students to study for the GED.