Summarize this article:

These are the people you'll see and interact with every day, so becoming friends with a few of them will give you a great support network throughout the school year. If you don't know them, introduce yourself and strike up a casual conversation, and if you do already know them, ask them a question about their hobbies or family so that you can get to know them a little better.  For example, introduce yourself to a potential new friend by saying, "Hi, I'm Sam. I really like your shirt, where did you get it?" Ask someone in one of your classes if they'd like to get together to study, or if they can help you with a homework question. You can even ask to exchange contact information so that if either of you have questions about homework, tests, or projects in the class, you can reach out to one another. High school is a great place to find people and clubs that share your interests. Sign up to be in the drama club, on the school newspaper, part of the art club—any club or activity that catches your attention and you think you'd enjoy.  Other extracurricular activities might include yoga, coding, or chess club. If your high school does not have a club that caters to your interests or passions, start one of your own! If you apply to college, include your activities on your application.  This helps give admissions committees a better idea about who you are as a person. Sports are a good way to get active while also being part of a close-knit team. Choose a sport you like, such as soccer, softball, basketball, or swimming, and work hard during practice and at games to make your team (and yourself!) proud.  Track and field has many different types of events, each designed to showcase a different talent or skill set. Try out dance team, cheer leading, or volleyball. Whether you're a freshman or a senior, you can always meet new people and form new relationships. Strike up a conversation with someone in the hall, sit with someone new at lunch, or offer to partner up with someone you're not friends with for a class project. You might leave with a new friend! If you don't feel comfortable talking to a complete stranger, say hello to the person whose locker is next to yours, or compliment someone's outfit in the lunch room. Events such as school dances, sports games, and pep rallies are all an essential part of the high school experience. Even if you aren't full of school spirit, try to go to at least one school event each season—you'll likely end up making great memories.  Invite a friend or two to come along with you. Ask your friend to introduce you to people you may not already know.

Summary:
Get to know the people in your classes. Become involved in extracurricular activities or clubs. Try out a sport to be part of a team. Reach out to people and make new friends. Attend school events to broaden your experiences.