Yes, I agree. When students choose one subject, they learn it well. They can find answers more easily. If they study many subjects, learning is slow and working is hard. But if the student always changes the topic, she cannot study well. She forgets the information and it is hard to find later. I think it is good for students to learn different things. But if they do not choose one subject, they cannot become good at their job For the reason student must be spealize.