the cdc is evaluating test to stay programs in school for students who may have been exposed to covid-19 in school, can stale tend classes in person rather than quarantine at home as long as they test negative for the disease and show no symptoms. >> so the approach may seem controversial but it's growing in popularity. jacqueline howard joins us with more on how some schools are following this approach. walk us through how this works. we know, look, we all want kids to learn in person. >> reporter: right, erica. there are questions to answer here. that's why the cdc is evaluating the approach. i spoke with three different superintendents across three different state, and they all say their test to stay programs have been successful in keeping children in the classroom while