A student gives her coronavirus swab to Helenann Civian, the principal of South Boston Catholic Academy in Boston in January. The White House announced $10 billion to expand testing in K-12 schools.

BOSTON – JANUARY 19: A student gives her coronavirus COVID-19 swab to Dr. Helenann Civian, the principal of South Boston Catholic Academy in Boston on Jan. 19, 2021. Pool testing means an entire classroom of students puts their swabs in the same cup and it’s tested as one sample, making it faster/cheaper. They are piloting it with schools around the country including South Boston Catholic Academy. (Photo by Suzanne Kreiter/The Boston Globe via Getty Images)