Nina’s grades could be better. She gets about five hours of sleep every weeknight and ten hours per night on weekends. How much sleep should she get to better concentrate on schoolwork?

Teens generally need about 8–10 hours of sleep each night to support attention and learning. Nina should aim for nine to ten hours every night, rather than getting too little on weekdays and trying to make up for it on weekends.

AI-written and checked against the verified answer.