Children attend a lesson in a school in Moscow, Russia, Monday, Sept. 7, 2020. Russian schools, which switched to online classes in late March when the coronavirus pandemic swept the country, have reopened this month. (AP Photo/Pavel Golovkin)

Russian children have returned to schools after attending classes online since the coronavirus pandemic swept the country in late March.

To prevent another spike in cases, all teachers underwent mandatory virus tests before primary and secondary schools reopened on Sept. 1. Temperature checks are conducted each morning and and school schedules were amended to reduce the number of students attending at the same time.

Authorities also limited how many children can be together in school cafeterias and recreation areas is also limited.

Masks in schools are not mandatory for all of Russia's 85 regions, though some provinces are requiring both students and teachers to wear them. Children with a classmate who tests positive for the coronavirus will be quarantined for two weeks.

Parents have the option of keeping their home to continue studying online.

  • A teacher measures students' temperature before the start of classes in a school in Moscow, Russia, Monday, Sept. 7, 2020. Russian schools, which switched to online classes in late March when the coronavirus pandemic swept the country, have reopened this month. (AP Photo/Pavel Golovkin)

  • Children attend a lesson in a school in Moscow, Russia, Monday, Sept. 7, 2020. Russian schools, which switched to online classes in late March when the coronavirus pandemic swept the country, have reopened this month. (AP Photo/Pavel Golovkin)

  • Children disinfect their hands before having a meal at a school in Moscow, Russia, Monday, Sept. 7, 2020. Russian schools, which switched to online classes in late March when the coronavirus pandemic swept the country, have reopened this month. (AP Photo/Pavel Golovkin)

  • Children prepare to get a meal during a break at a school in Moscow, Russia, Monday, Sept. 7, 2020. Russian schools, which switched to online classes in late March when the coronavirus pandemic swept the country, have reopened this month. (AP Photo/Pavel Golovkin)

  • A teacher measures students' temperature before the start of classes in a school, with the chemical protection suits in the background at a school in Moscow, Russia, Monday, Sept. 7, 2020. Russian schools, which switched to online classes in late March when the coronavirus pandemic swept the country, have reopened this month. (AP Photo/Pavel Golovkin)

  • A school teacher gives an online lesson in an empty classroom because one of children is suspected of being infected with the coronavirus in Moscow, Russia, Monday, Sept. 7, 2020. Russian schools, which switched to online classes in late March when the coronavirus pandemic swept the country, have reopened this month. (AP Photo/Pavel Golovkin)