Bilingual school. Some people agree that they think mobile phones are very useful. They can use them to call their friends and parents.
But there are also many people who disagree with this.
They don't like it, because mobile phones usually interfere with teachers and other students who like to study, which may make students lazy.
They may give up their research. In your small world, we shouldn't go to mobile phone school, because it may make you have more fun and learn more. That's your little world.