Scenario 1.

Mr White enters the class.

Class : Hi Mr White!

Mr White : Hullo everyone. :D

Scenario 2.

Class : *enagaging in a group chat*

Mr black enters the class.

Class : ... *silent for the next few minutes*

Mr Black : Why are all of you so quiet????

Class : ???

Mr Black : Okay, everyone gets an A today.

Class : Hahaha.*rolleyes*

(Note : It's not a racist joke.)

Prior to that, Mr Black may heed these tips from Wikihow.

1. Be willing to step out of your comfort zone. If you're not popular, it's because you're not comfortable doing the things that popular people tend to do--making conversation, cracking jokes, flirting, and in general, engaging people.

2. Be friendly. Popular people are on friendly terms with pretty much everyone--not only their peers, but also the teachers, the supervisors, the grocery store clerk, the janitor, the parents, the kids, and generally anyone who's even the tiniest bit nice. (The only people they're not friends with are the ones who are practically impossible to get along with.) They're on good enough terms that they can hold a short, friendly conversation with anyone in the room. There's no reason you can't do that, too.


3. Talk to anyone and everyone who crosses your path. Smile, say hello, and if they greet you back, ask them how they're doing. No matter where you go, make it a habit to chat with strangers and acquaintances alike, even if it's just for a few minutes.
Keep it casual. Small talk is all about sticking to "safe" topics. Stay away from anything controversial, like religion or politics. By expressing your views on a controversial topic, you're bound to be unpopular with people who disagree. Keep the topics "light".

4. Be polite. Respect people's privacy; don't pry. Learn to read body language so you can see when your questions are starting to make them feel uncomfortable. Don't invite yourself anywhere, don't brag, and don't interrupt. In other words, don't be annoying.

5. Stop thinking about yourself. People will think you're self-centered, and not many people like that kind.Of all the people skills that popular individuals have, the one that none of them can do without is empathy. How well do you relate to other people? If you're so caught up in how they perceive you that you don't consider how they feel, then you're being self-absorbed--not in that cocky, obnoxious sort of way, but still, your thoughts are revolving around you. Stop worrying so much about how you look, how you sound, how you compare, and start thinking about how other people are doing. Ask them how work or school is going, how their family is doing, how that situation they mentioned a while back turned out, and so on. Then relate. Talk to them about how you or someone you know had something similar happen to them, and how they dealt with it. Find common ground.

6. Give a helping hand. Do little things to establish rapport (in addition to some big things, like volunteering). Offer someone a pencil when they need it. Hold the door open and wait for the person behind them. Listen to people when they talk, and they offer to help somehow. If you truly empathize with people, you'll want things to work out for them. If there's nothing you can do to help then, at the very least, let them know that you're hoping the best for them.