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Health Practices

General Health Practices, Guidance, and Resources 

As students and staff return to school, it’s important that everyone stay vigilant when it comes to preventing the spread of COVID-19. To ensure that everyone in our school communities stay healthy, please follow the guidelines set forth by your school and by county public health. Stay home when you’re sick; wear a face covering and physically distance yourself from others, when necessary; and thoroughly wash your hands. If each of us makes an effort, we can help prevent the spread of this virus. 

COVID-19 Decision Trees

Changes to the definition of 'close contact' and its application in Cal/OSHA's Emergency Temporary Standards are reflected in the latest COVID-19 decision tree, updated Nov. 16, 2022. The Spanish version is also current. If you are not seeing the most current version of the decision tree, please clear your internet cache, reload the page, and download the correct version. The decision tree will be updated as needed to reflect the latest public health guidance. Please check this page weekly to ensure you are using the latest version.

Snapshot of State and County Requirements on Masking, Testing, and Notification (Spanish)

The e-Decision Tree (last updated Dec. 6) is a digital representation of the San Diego County COVID-19 K-12 Decision Trees developed by the San Diego Supercomputer Center, UC San Diego in collaboration with the UC San Diego School of Medicine Division of Child and Community Health, and the San Diego County Office of Education. The e-Decision Tree has been updated to include the new “group tracing” option and is now able to calculate dates for testing and return for household exposures.


Common Terms

Contact Tracing and Close Contacts

Group Tracing



Vaccination Status

Requirements Versus Recommendations