Schoolchildren listen to their teacher at the primary school Simone Veil during its reopening in Nice as a small part of French children head back to their schools with new rules and social distancing during the outbreak of the coronavirus disease (COVID-19) in France, May 12, 2020.

Schoolchildren line up to enter the primary school Simone Veil during its reopening in Nice as a small part of French children head back to their schools with new rules and social distancing during the outbreak of the coronavirus disease (COVID-19) in France, May 12, 2020.

A schoolgirl washes her hands as she enters the primary school Simone Veil during its reopening in Nice as a small part of French children head back to their schools with new rules and social distancing during the outbreak of the coronavirus disease (COVID-19) in France, May 12, 2020.

Schoolchildren listen to their teacher at the primary school Simone Veil during its reopening in Nice as a small part of French children head back to their schools with new rules and social distancing during the outbreak of the coronavirus disease (COVID-19) in France, May 12, 2020.

A schoolgirl wearing a protective face mask enters the primary school Simone Veil during its reopening in Nice as a small part of French children head back to their schools with new rules and social distancing during the outbreak of the coronavirus disease (COVID-19) in France, May 12, 2020.

Schoolchildren listen to their teacher at the primary school Simone Veil during its reopening in Nice as a small part of French children head back to their schools with new rules and social distancing during the outbreak of the coronavirus disease (COVID-19) in France, May 12, 2020.

A teacher, wearing a protective face mask, teaches to schoolchildren in a classroom at a private school during its reopening in Saint-Sebastien-sur-Loire near Nantes as a small part of French children head back to their schools with new rules and social distancing during the outbreak of the coronavirus disease (COVID-19) in France, May 12, 2020.

A teacher wearing a protective face mask sprays hydroalcoholic solution to schoolchildren's hands as they enter their school during its reopening in Saint-Sebastien-sur-Loire near Nantes as a small part of French children head back to their schools with new rules and social distancing during the outbreak of the coronavirus disease (COVID-19) in France, May 12, 2020.

A teacher, wearing a protective face mask, talks to schoolchildren in the courtyard at a private school during its reopening in Saint-Sebastien-sur-Loire near Nantes as a small part of French children head back to their schools with new rules and social distancing during the outbreak of the coronavirus disease (COVID-19) in France, May 12, 2020.

Schoolchildren line up to clean their hands before to enter their school during its reopening in Saint-Sebastien-sur-Loire near Nantes as a small part of French children head back to their schools with new rules and social distancing during the outbreak of the coronavirus disease (COVID-19) in France, May 12, 2020.

A teacher, wearing a protective face mask, teaches to schoolchildren in a classroom at a private school during its reopening in Saint-Sebastien-sur-Loire near Nantes as a small part of French children head back to their schools with new rules and social distancing during the outbreak of the coronavirus disease (COVID-19) in France, May 12, 2020.

A teacher sprays hydroalcoholic solution to the hands of a schoolchild as he enters his school during its reopening as children head back to their schools with new rules and social distancing during the outbreak of the coronavirus disease (COVID-19), May 12, 2020.

Schoolchildren listen to their teacher at the primary school Simone Veil during its reopening in Nice as a small part of French children head back to their schools with new rules and social distancing during the outbreak of the coronavirus disease (COVID-19) in France, May 12, 2020.

School staff, wearing protective face masks, stand in the courtyard at the primary school Simone Veil during its reopening in Nice as a small part of French children head back to their schools with new rules and social distancing during the outbreak of the coronavirus disease (COVID-19) in France, May 12, 2020.

A sign reading "Keep your distance" is seen at the primary school Simone Veil during its reopening in Nice as a small part of French children head back to their schools with new rules and social distancing during the outbreak of the coronavirus disease (COVID-19) in France, May 12, 2020.

A teacher, wearing a protective face mask, talks to schoolchildren in the courtyard at a private school during its reopening in Saint-Sebastien-sur-Loire near Nantes as a small part of French children head back to their schools with new rules and social distancing during the outbreak of the coronavirus disease (COVID-19) in France, May 12, 2020.

Schoolchildren, wearing protective face masks, line up as they enter the primary school Simone Veil during its reopening in Nice as a small part of French children head back to their schools with new rules and social distancing during the outbreak of the coronavirus disease (COVID-19) in France, May 12, 2020.

A schoolgirl is seen at the primary school Simone Veil during its reopening in Nice as a small part of French children head back to their schools with new rules and social distancing during the outbreak of the coronavirus disease (COVID-19) in France, May 12, 2020.

Schoolchildren listen to their teacher at the primary school Simone Veil during its reopening in Nice as a small part of French children head back to their schools with new rules and social distancing during the outbreak of the coronavirus disease (COVID-19) in France, May 12, 2020.

A schoolgirl washes her hands as she enters the primary school Simone Veil during its reopening in Nice as a small part of French children head back to their schools with new rules and social distancing during the outbreak of the coronavirus disease (COVID-19) in France, May 12, 2020.

Teachers wearing protective face masks spray hydroalcoholic solution to schoolchildren's hands as they enter their school during its reopening in Saint-Sebastien-sur-Loire near Nantes as a small part of French children head back to their schools with new rules and social distancing during the outbreak of the coronavirus disease (COVID-19) in France, May 12, 2020.

A teacher holds a bottle of hydroalcoholic solution as she stands at the entrance of a school during its reopening in Saint-Sebastien-sur-Loire near Nantes as a small part of French children head back to their schools with new rules and social distancing during the outbreak of the coronavirus disease (COVID-19) in France, May 12, 2020.

Schoolchildren line up to enter their school during its reopening in Saint-Sebastien-sur-Loire near Nantes as a small part of French children head back to their schools with new rules and social distancing during the outbreak of the coronavirus disease (COVID-19) in France, May 12, 2020.

A teacher, wearing a protective face mask, teaches to schoolchildren in a classroom at a private school during its reopening in Saint-Sebastien-sur-Loire near Nantes as a small part of French children head back to their schools with new rules and social distancing during the outbreak of the coronavirus disease (COVID-19) in France, May 12, 2020.

Signs to maintain social disctancing between children are seen on the ground in the courtyard at a private school during its reopening in Saint-Sebastien-sur-Loire near Nantes as a small part of French children head back to their schools with new rules and social distancing during the outbreak of the coronavirus disease (COVID-19) in France, May 12, 2020.

A teacher, wearing a protective face mask, teaches to schoolchildren in a classroom at a private school during its reopening in Saint-Sebastien-sur-Loire near Nantes as a small part of French children head back to their schools with new rules and social distancing during the outbreak of the coronavirus disease (COVID-19) in France, May 12, 2020.

Social distancing signs are seen on a table as schoolchildren listen to their teacher at the primary school Simone Veil during its reopening in Nice as a small part of French children head back to their schools with new rules and social distancing during the outbreak of the coronavirus disease (COVID-19) in France, May 12, 2020.

A teacher, wearing a protective face mask, teaches to schoolchildren in a classroom at a private school during its reopening in Saint-Sebastien-sur-Loire near Nantes as a small part of French children head back to their schools with new rules and social distancing during the outbreak of the coronavirus disease (COVID-19) in France, May 12, 2020.

Schoolchildren line up as they enter the primary school Simone Veil during its reopening in Nice as a small part of French children head back to their schools with new rules and social distancing during the outbreak of the coronavirus disease (COVID-19) in France, May 12, 2020.

Schoolchildren listen to their teacher at the primary school Simone Veil during its reopening in Nice as a small part of French children head back to their schools with new rules and social distancing during the outbreak of the coronavirus disease (COVID-19) in France, May 12, 2020.

Teachers wearing protective face masks welcome schoolchildren they enter their school during its reopening in Saint-Sebastien-sur-Loire near Nantes as a small part of French children head back to their schools with new rules and social distancing during the outbreak of the coronavirus disease (COVID-19) in France, May 12, 2020.

A teacher, wearing a protective face mask, teaches to schoolchildren in a classroom at a private school during its reopening in Saint-Sebastien-sur-Loire near Nantes as a small part of French children head back to their schools with new rules and social distancing during the outbreak of the coronavirus disease (COVID-19) in France, May 12, 2020.