Get the De Anza High School mobile app today! De Anza High School is a public school, grades 9-12, located in Richmond, California and is part of the West Contra Costa Unified School District. Whether you are a student, parent, or faculty member you will find helpful information in the De Anza High School app. Here are just a few of the helpful features in the De Anza High School mobile app: - Staff directory with contact information. - Click to call directory for the most popular school phone numbers. No more trying to remember what they actually are. - Get timely updates on school emergencies and events. - Easy access to the school calendar. - Easily connect to social channels and submit yearbook photos directly to staff members. - School news right at your fingertips.