Smartphones have changed our lives. On the positive side,
they allow us to study anytime through educational apps
and communicate instantly. For example, I often watch
science experiment videos to prepare for class. However,
overuse of phones can cause problems. Some classmates
stay up late playing games, leading to poor concentration
in school. To balance this, families should set rules
like "no phones during meals" and encourage outdoor
activities. Technology is useful, but self-control is key.