My Son is 15 years old. He is very lazy, don't do exercise. He study one day before his exam. No. Schedule, no any routine. He spend most of his time in his laziness. After that he said I have no time. I talked him so many times and so many type for his wastage of time. That time he understood but next day again he come back to zero. Many time I make his time-table but he don't follow that. When he study low music always with him. If he has 2 hrs. For study only 1/3 time only use for study. Rest time he makes only plans.