A close-up of a teacher's hand partially visible, gesturing while facing a bright classroom, their back turned to the viewer. The teacher wears a professional suit, with the focus on their outstretched hand, making an explaining gesture, and blurred, attentive young students in the background. Brigh and natural lighting, vibrant and cheerful colors, modern academic setting, highly realistic, detailed, like a stylish photograph for an add --ar 3:2