PARIS, France — Protests by teenagers outside their schools have shaken France in recent days, with students blockading entrances to their institutions and security forces on occasion responding with tear gas. The government has said that while the grievances may be legitimate, violence is not and has accused the hard-left of whipping up the movement. Critics have meanwhile accused some police of heavy-handed force against protesters, who are legally still children. More than 5,000 people have been arrested since Monday, according to the interior ministry, while about 735 educational establishments were affected on Friday, the education minister said. While the weekend may see a lull, a major new day of protest is planned for Tuesday. AFP looks at the origins of the movement. Multiple grievances The protests affect lycees, the schools where French teens have their last years of school aged from 15-18, the equivalent of high school in the United States and sixth form in the United Kingdom. The students' grievances are numerous, but chief among them are teacher absences, conditions in classr