A primary school has swapped hot classrooms for cool waters as pupils take lessons in a nearby stream during the heatwave. Children at Grasmere Primary School in Cumbria have been learning maths, physics and water safety in their local beck, with staff saying the hands-on approach has helped pupils re-engage. Headteacher Jo Goode said: "We can see the children's brains turning back on as soon as they're in the water.