Through a Freedom of Information Act request, the Tribune determined that about 40 of the district-run schools were below the 10% sign-up threshold as CTU prepared to vote on the safety agreement in mid-January. A few schools, such as Mildred I. Lavizzo Elementary School in the Roseland neighborhood and Mount Greenwood Elementary School, had fewer than 2.5% of students registered for testing at the time, according to CPS data.
