A teacher writing on a classroom blackboard, with students seated below. The teacher, dressed in a neat, professional outfit with a white shirt and dark trousers, is focused on writing a math equation on the blackboard with chalk. The blackboard is filled with various notes and diagrams. The classroom is bright and welcoming, with sunlight streaming in through large windows. The students, dressed in school uniforms, are seated at their desks, some taking notes while others are attentively watching the teacher. The classroom walls are adorned with educational posters and a clock showing mid-morning time. The atmosphere is one of concentration and learning. --ar 16:9 --s 400 --niji 6