Parents and children arrive at Jules Julien Elementary School in Toulouse on June 22, the day schools reopened in France on a compulsory basis. (Lionel Bonaventure/AFP/Getty Images)

BRUSSELS — Many countries around the world are pushing ahead with plans for full-time, full-capacity, in-person classes, after having largely avoided coronavirus outbreaks linked to schools during more tentative reopenings in the spring.

From Belgium to Japan, schools are abandoning certain social distancing measures, such as alternate-day schedules or extra space between desks. They have decided that part-time or voluntary school attendance, supplemented by distance learning, is not enough — that full classrooms are preferable to leaving kids at home.