In the most ambitious plan of its kind, Los Angeles Unified has announced plans to test its roughly 600,000 students and 75,000 employees as the US’ second-largest school district prepares for the eventual return to in-person instruction, The Guardian reported.

The superintendent of Los Angeles Unified, Austin Beutner, said in a statement the program will provide regular Covid testing and contact tracing for school staff, students and families.

The testing program is set to kick off Monday, with additional services to roll out as the school year continues. Over time, testing will be available to all children and staff members in the sprawling school district that has more than 600,000 students. The district said services will also be offered to family members of students and staff who test positive for COVID-19.

Los Angeles Unified, which has been closed for in-person instruction since March, last month announced plans to begin the new school year online as case numbers surged.