At least 160,000 people take to streets in third week of French school protests

Swedish activist Greta Thunberg joins teenagers calling for investment to fix teacher shortages and crumbling schools

More than 160,000 schoolchildren, students and trade unionists have marched in cities across France as protests over high school education continued into a third week and many demonstrators denounced policing tactics.

Riot police fired teargas at the end of Tuesday's marches in Nantes and near the Montparnasse area of Paris, but most of the demonstrations over teacher shortages, overcrowded classes and crumbling school buildings held in cities including Lyon, Lille and Marseille were peaceful.