First-graders of one of the schools in Moscow listen to a teacher at a peace lesson, which takes place annually on September 1 in all Soviet schools. The teacher talks with students (synchronously). Children caring for calves, sheep, horses, mowing grass during their stay in the labor and rest camp "Ulalzai" state farm "Udinsky" Buryat ASSR. Children living in the regions of the Byelorussian SSR, affected by the accident at the Chernobyl nuclear power plant, rest in a pioneer camp in the Chechen-Ingush Autonomous Soviet Socialist Republic: they bathe in the river, bake potatoes in a fire, dance at a carnival in the camp.