In London, some schools stop kids from having a best friend. They teach kids to play together in groups. The Sun says that some schools in England have best-friendbans. Teachers say that it's not good for kids to have only one best friend. If the best friend isn't with him or her, he or she may feel sad. Best-friend bans aren't just in England. They are also in other countries.

But many people don't think it's a good idea to have the ban. They say it's better to learn that good things don't always last at a young age. Atherton is a teacher from Canada. She says friends are very important to children. Having a best friend helps a child to be happy. "Children should have more friends. Then they can enjoy playing with many other friends, not only one," Atherton says. She also says that a best friend can know all your secrets. That is to say, you can tell your best friend everything.