Based on the text provided, here are three reasons why it is important to go to an international school:
1. It helps you to **know each other better and understand more about each other’s religions and lifestyles**. This means it broadens your perspective and understanding of different cultures, something you can't easily do just by reading a book.
2. It's **better than reading a book in a classroom**. The text states that it is more beneficial to have real-life experiences rather than just reading about them in a book.
3. You can **make great friends**. The text emphasizes that participants in the cross-cultural project not only learned a lot but also made lasting friendships.