Two weeks after Israel fully reopened schools, a COVID-19 outbreak sweeping through classrooms..

After Reopening Schools, Israel Orders Them To Shut If COVID-19 Cases Are Discovered

...Schools first began to reopen in early May, with classes staggered in smaller groups or "capsules" of students to prevent a wide outbreak. By May 17, limitations on class size were lifted.

The most significant outbreak appeared last week in the Gymnasia Rehavia, a historic middle and high school in Jerusalem. There, 116 students and 14 teachers were infected, according to the Ministry of Education, and the school closed. Built in 1928, its graduates include prominent novelists, politicians and Netanyahu's late brother.

Health officials said they're investigating how the virus spread there. A teacher told NPR a seventh-grader was first discovered to be carrying the virus and the entire grade was ordered to quarantine at home. Then a ninth-grader tested positive, and the school was shut down.

"It was a mistake to go back to school in this format," the teacher said... 

https://www.npr.org/sections/coronavirus-live-updates/2020/06/03/868507524/israel-orders-schools-to-close-when-covid-19-cases-are-discovered