A student exchange program is when you, as a student, get the opportunity to go to a different school in another country, and at the same time, a student from that school comes to study in your school. It's like when you go over to your friend's house and they come over to your house to play, except that you get to go to another country and learn about new cultures, languages, and people.
Before you go on an exchange program, there are some things that need to happen first. You need to apply to a program, and your school needs to approve your participation. You may also need to get some special medical check-ups, vaccinations, or other requirements depending on the country you're going to.
When you arrive in the new country, you will stay with a host family or in a dorm, and attend classes at the foreign school. You will also get to explore the country with the help of your host family or your school. You will make new friends, learn new things, and share your own culture with others.
During the exchange program, you will be responsible for adjusting to your new environment and maintaining your grades in your new school. It may be hard at first, but it's a great opportunity for you to become more independent and learn new skills.
After the exchange program is finished, you'll go back to your home country with new-found knowledge and experiences. The memories you create will last forever, and you may even be able to visit your exchange family in the future to stay connected with the people and culture you've experienced.