Inquire To learn more about our programs, admissions process, or to schedule a tour, please complete the form below. Contact BASIS Independent Silicon Valley Lower School (TK—Grade 5) 1500 Partridge Avenue, Sunnyvale, CA 94087 Directions | (408) 638-6518 Upper School (Grade 6—Grade 12) 1290 Parkmoor Ave, San Jose, CA 95126 Directions | (408) 547-4283 Parent/Guardian Information *Required Notice: JavaScript is required for this content.