Are you considered not cool in school? You might have already read up on how to be cool, but you might be wondering: How do I apply that in a new school?
Always remember, the first day of high school is the most crucial. First impressions are EVERYTHING! It's how people will perceive you as, for a while at least, until they get to know you better, which will take time. Be kind and nice and people will know you as a good person

If you are a total newcomer, try to find people who have similar interests to your own, which will provide an easy icebreaker conversation. Being new is a benefit, because (unless you were very popular at your old school) you'll have a whole new, fresh start and a chance to get a new identity.

Try to identify who's where on the social ladder, but on the first day, just try to get settled in! If you are new, your main goal on the first day should just be to make friends! Be friendly and socialize with as many people as you can without getting them mixed up.Do not try to be friends with them only because they are "popular." However, after you've been in school for a while and are settled in, you can befriend one of the nicer popular people, they'll be your ticket into "the group." At the end of your first year in the school, try to have found some close friends to regularly spend time with. Having a wide variety of friends helps a lot.
Avoid being a bully and avoid becoming the victim of one. Don't be mean to other people in your school just to make yourself seem cooler. In fact, people generally hate bullies. Also, don't let bullies push you around. It's easier said than done, but in school, using your sense of humor and good social tactics are key.