From the Document: "This document provides guidance to K-12 [kindergarten to 12th grade] schools on COVID-19 [coronavirus disease 2019] symptom screening as part of a school reopening process. The guidance detailed here is intended only for students in K-12 school settings. The number of reported children with SARS-CoV-2 [severe acute respiratory syndrome coronavirus 2] (the virus that causes COVID-19) infection who experience symptoms, the types of symptoms they experience, and the severity of those symptoms differs from adults. Additionally, the consequences of excluding students from essential educational and developmental experiences differ from excluding individuals from other settings. Therefore, the considerations described here are different than those for other settings and populations."
Centers for Disease Control and Prevention: https://www.cdc.gov/