Tens of thousands of demonstrators, including high school students and unions, have taken to the streets. The students are expressing dissatisfaction with various aspects of their educational environment. They are complaining about a lack of teachers, overcrowded schedules, and poor condition of classrooms and buildings.

Some protests have proceeded without incident, while others have been marked by confrontations with law enforcement. The demonstrations have highlighted the students' concerns about the state of their schools, including the inability of buildings to cope with high temperatures.

Further details about the protests and the students' grievances are available from the source, providing more insight into the situation and the reasons behind the demonstrations.