San Dieguito resolves to open when county moves to red tier A teacher workstation at La Costa Canyon High School. (Courtesy) The San Dieguito Union High School District believes they are prepared to safely bring students back when the county is out of the purple tier. For San Dieguito schools to reopen for in-person learning, the county must be in the state’s red tier for five consecutive days. Currently the county is “deep into purple” due to COVID-19 case numbers and the percentage of positive tests. “The district strongly desires for all students who wish to return for in-person instruction be given the opportunity to do so and is prepared to immediately bring all of those students back to campus as soon as the district is legally able to do so,” stated a resolution passed by the board on Jan. 21.