A woman reacts as teachers attend a march during strike action in a dispute over pay, in London, Britain March 15, 2023. REUTERS/Peter Nicholls 

Teachers attend a march during strike action in a dispute over pay, in London, Britain March 15, 2023. REUTERS/Peter Nicholls 

The Elizabeth Tower, more commonly known as Big Ben, is seen as teachers attend a march during strike action in a dispute over pay, in London, Britain March 15, 2023. REUTERS/Peter Nicholls 

Teachers attend a march during strike action in a dispute over pay, in London, Britain March 15, 2023. REUTERS/Peter Nicholls 

A placard is held as teachers attend a march during strike action in a dispute over pay, in London, Britain March 15, 2023. REUTERS/Peter Nicholls 

Teachers attend a march during strike action in a dispute over pay, in London, Britain March 15, 2023. REUTERS/Peter Nicholls 

Teachers attend a march during strike action in a dispute over pay, in London, Britain March 15, 2023. REUTERS/Peter Nicholls 

People pass a banner over their heads as teachers march during strike action in a dispute over pay, in London, Britain March 15, 2023. REUTERS/Peter Nicholls 

A woman wearing health worker scrubs holds a placard in Trafalgar Square during a rally in support of health workers and teachers who are on strike in London, Britain, March 15, 2023. REUTERS/Kevin Coombs 

A woman wearing health worker scrubs holds a placard in Trafalgar Square during a rally in support of health workers and teachers who are on strike in London, Britain, March 15, 2023. REUTERS/Kevin Coombs 

A woman wearing health worker scrubs holds a placard in Trafalgar Square during a rally in support of health workers and teachers who are on strike in London, Britain, March 15, 2023. REUTERS/Kevin Coombs 

A woman wearing health worker scrubs holds a placard in Trafalgar Square during a rally in support of health workers and teachers who are on strike in London, Britain, March 15, 2023. REUTERS/Kevin Coombs 

Teachers attend a march during strike action in a dispute over pay, in London, Britain March 15, 2023. REUTERS/Peter Nicholls 

Teachers attend a march during strike action in a dispute over pay, in London, Britain March 15, 2023. REUTERS/Peter Nicholls 

Teachers attend a march during strike action in a dispute over pay, in London, Britain March 15, 2023. REUTERS/Peter Nicholls 

Teachers attend a march during strike action in a dispute over pay, in London, Britain March 15, 2023. REUTERS/Peter Nicholls 

Teachers attend a march during strike action in a dispute over pay, in London, Britain March 15, 2023. REUTERS/Peter Nicholls 

A person holds a placard depicting football presenter Gary Lineker, as teachers march during strike action in a dispute over pay, in London, Britain March 15, 2023. REUTERS/Peter Nicholls 

Teachers attend a march during strike action in a dispute over pay, in London, Britain March 15, 2023. REUTERS/Peter Nicholls 

Teachers attend a march during strike action in a dispute over pay, in London, Britain March 15, 2023. REUTERS/Peter Nicholls 

Junior doctors Nisha Thapa (L) and Sophia Terry sit by the fountains in Trafalgar Square ahead of a rally in support of health workers and teachers who are on strike in London, Britain, March 15, 2023. REUTERS/Kevin Coombs 

Teachers attend a march during strike action in a dispute over pay, in London, Britain March 15, 2023. REUTERS/Peter Nicholls 

Teachers attend a march during strike action in a dispute over pay, in London, Britain March 15, 2023. REUTERS/Peter Nicholls 

Teachers attend a march during strike action in a dispute over pay, in London, Britain March 15, 2023. REUTERS/Peter Nicholls 

Teachers from the National Education Union display placards on a picket line outside Lady Margaret School during a strike in Fulham, London, Britain March 2, 2023. REUTERS/Kevin Coombs 

Teachers from the National Education Union display placards on a picket line outside Lady Margaret School during a strike in Fulham, London, Britain March 2, 2023. REUTERS/Kevin Coombs 

Teachers from the National Education Union display placards on a picket line outside Lady Margaret School during a strike in Fulham, London, Britain March 2, 2023. REUTERS/Kevin Coombs 

Teachers from the National Education Union display placards on a picket line outside Lady Margaret School during a strike in Fulham, London, Britain March 2, 2023. REUTERS/Kevin Coombs 

Teachers from the National Education Union display placards on a picket line outside Lady Margaret School during a strike in Fulham, London, Britain March 2, 2023. REUTERS/Kevin Coombs 

French President Emmanuel Macron listens to a teacher in a classroom during a prevention session for schoolchildren on the papillomavirus (HPV infection) as he visits the College Jean Lartaut Middle School in Jarnac, France, February 28, 2023. REUTERS/Stephane Mahe/Pool 

A woman displays a placard as teachers attend a march during strike action in dispute over pay, in Manchester, Britain, February 28, 2023. REUTERS/Phil Noble 

Teachers attend a march during strike action in dispute over pay, in Manchester, Britain, February 28, 2023. REUTERS/Phil Noble 

Teachers attend a march during strike action in dispute over pay, in Manchester, Britain, February 28, 2023. REUTERS/Phil Noble 

Teachers attend a march during strike action in dispute over pay, in Manchester, Britain, February 28, 2023. REUTERS/Phil Noble 

Teachers attend a march during strike action in dispute over pay, in Manchester, Britain, February 28, 2023. REUTERS/Phil Noble 

Teachers attend a march during strike action in dispute over pay, in Manchester, Britain, February 28, 2023. REUTERS/Phil Noble 

Teachers attend a march during strike action in dispute over pay, in Manchester, Britain, February 28, 2023. REUTERS/Phil Noble 

Teachers attend a march during strike action in dispute over pay, in Manchester, Britain, February 28, 2023. REUTERS/Phil Noble 

Teachers attend a march during strike action in dispute over pay, in Manchester, Britain, February 28, 2023. REUTERS/Phil Noble 

Teachers attend a march during strike action in dispute over pay, in Manchester, Britain, February 28, 2023. REUTERS/Phil Noble 

Teachers attend a march during strike action in dispute over pay, in Manchester, Britain, February 28, 2023. REUTERS/Phil Noble 

Teachers attend a march during strike action in dispute over pay, in Manchester, Britain, February 28, 2023. REUTERS/Phil Noble 

Teachers attend a march during strike action in dispute over pay, in Manchester, Britain, February 28, 2023. REUTERS/Phil Noble 

Police officers secure the entrance to the Saint-Thomas d'Aquin high school where a teacher was stabbed to death by a pupil in Saint-Jean-de-Luz, France, February 22, 2023. REUTERS/Vincent West 

France's Education Minister Najat Vallaud-Belkacem and Bayonne public prosecutor Jerome Bourrier talk at the entrance to the Saint-Thomas d'Aquin high school where a teacher was stabbed to death by a pupil in Saint-Jean-de-Luz, France, February 22, 2023. REUTERS/Vincent West 

Police officers secure the entrance to the Saint-Thomas d'Aquin high school where a teacher was stabbed to death by a pupil in Saint-Jean-de-Luz, France, February 22, 2023. REUTERS/Vincent West 

People stand outside the entrance to the Saint-Thomas d'Aquin high school where a teacher was stabbed to death by a pupil in Saint-Jean-de-Luz, France, February 22, 2023. REUTERS/Vincent West 

Police officers carry flowers left at the entrance to the Saint-Thomas d'Aquin high school where a teacher was stabbed to death by a pupil in Saint-Jean-de-Luz, France, February 22, 2023. REUTERS/Vincent West 

Police officers secure the entrance to the Saint-Thomas d'Aquin high school where a teacher was stabbed to death by a pupil in Saint-Jean-de-Luz, France, February 22, 2023. REUTERS/Vincent West 

Police officers secure the entrance to the Saint-Thomas d'Aquin high school where a teacher was stabbed to death by a pupil in Saint-Jean-de-Luz, France, February 22, 2023. REUTERS/Vincent West 

Police officers secure the entrance to the Saint-Thomas d'Aquin high school where a teacher was stabbed to death by a pupil in Saint-Jean-de-Luz, France, February 22, 2023. REUTERS/Vincent West 

People embrace at the entrance to the Saint-Thomas d'Aquin high school, where a teacher was stabbed to death by a pupil in Saint-Jean-de-Luz, France, February 22, 2023. REUTERS/Vincent West 

People embrace at the entrance to the Saint-Thomas d'Aquin high school where a teacher was stabbed to death by a pupil in Saint Jean de Luz, France, February 22, 2023. REUTERS/Vincent West 

Police secure the entrance to the Saint-Thomas d'Aquin high school where a teacher was stabbed to death by a pupil in Saint-Jean-de-Luz, France, February 22, 2023. REUTERS/Vincent West 

France's Education Minister Najat Vallaud-Belkacem addresses members of the media at the Saint-Thomas d'Aquin high school where a teacher was stabbed to death by a pupil in Saint-Jean-de-Luz, France, February 22, 2023. REUTERS/Vincent West 

French President Emmanuel Macron delivers a speech flanked by Mourad Dali, in charge of organization and operation of almshouses, and teacher-researcher at the Islamic Institute of Advanced Studies (IHEI) Jean Abd Al-Wadoud Gouraud during a plenary meeting of the Forum for the Islam of France (FORIF) at the Elysee Presidential Palace, in Paris, February 16, 2023. Ludovic Marin/Pool via REUTERS 

French President Emmanuel Macron delivers a speech flanked by Mourad Dali, in charge of organization and operation of almshouses, and teacher-researcher at the Islamic Institute of Advanced Studies (IHEI) Jean Abd Al-Wadoud Gouraud during a plenary meeting of the Forum for the Islam of France (FORIF) at the Elysee Presidential Palace, in Paris, February 16, 2023. Ludovic Marin/Pool via REUTERS 

French President Emmanuel Macron shakes hands with Teacher-researcher at the Islamic Institute of Advanced Studies (IHEI) Jean Abd Al-Wadoud Gouraud during a plenary meeting of the Forum for the Islam of France (FORIF) at the Elysee Presidential Palace, in Paris,February 16, 2023. Ludovic Marin/Pool via REUTERS 

French President Emmanuel Macron delivers a speech flanked by Mourad Dali, in charge of organization and operation of almshouses, and Teacher-researcher at the Islamic Institute of Advanced Studies (IHEI) Jean Abd Al-Wadoud Gouraud during a plenary meeting of the Forum for the Islam of France (FORIF) at the Elysee Presidential Palace, in Paris, February 16, 2023. Ludovic Marin/Pool via REUTERS 

French President Emmanuel Macron delivers a speech flanked by Mourad Dali, in charge of organization and operation of almshouses, and Teacher-researcher at the Islamic Institute of Advanced Studies (IHEI) Jean Abd Al-Wadoud Gouraud during a plenary meeting of the Forum for the Islam of France (FORIF) at the Elysee Presidential Palace, in Paris, February 16, 2023. Ludovic Marin/Pool via REUTERS