Sixth grade pupils take part with their teacher (Rear C) in a themed treasure hunt based on mathematics as part of "L'ecole du dehors" (Outside School) class on March 14, 2024 in Vezin, Belgium. 25 schoolchildren from the village of Vezin attend a geometry lesson taking place in a vast green space made available to them 10 minutes on foot from their establishment: It's time for the "Outside School", a practice that the French-speaking region of Wallonia has been developing since the Covid crisis, relying on a network of associations which train and support teachers in this new type learning. (Photo by JOHN THYS / AFP)