Create a humorous classroom scene where a teacher stands at the front

Create a humorous classroom scene where a teacher stands at the front, looking amused and slightly frustrated, while pointing towards a student who has fallen asleep at their desk. The student, half-awake with a sleepy smile, is trying to explain himself with a cheeky expression. Other students in the background are giggling or smiling, and the classroom is filled with typical elements like a blackboard, desks, books, and posters. The overall mood should be light-hearted and funny, capturing the