In one sentence, describe what the following article is about:

Teachers like to relax and have fun on the weekends just like you. Sometimes it might seem like they only exist to make your life miserable, but remember that they probably became a teacher because they like working with young people and love helping them learn.  Show interest in your teacher’s life. You can ask them how their weekend was, or what they have planned for summer vacation. Don't talk behind a teacher's back. They will probably find out after a while. Gossiping about the teacher will get you in bigger trouble. Imagine if you came into work and everyone around you had a bad attitude. That’s what it can feel like for a teacher with a room full of grumpy students. Acting friendly and being happy to see your teacher will brighten their day and help them feel appreciated by you.  A teacher can tell when a student is genuinely being friendly or just sucking up. Don’t go too far and start acting fake. Just a simple "Good morning!" or "Good evening!" is all it takes to brighten a teacher's day. You and your teacher might disagree about the grade you deserve in a class. However, your teacher has probably given your grade a lot of consideration. If you contest the grade your teacher gave you, they’ll think you care more about your grades than about the learning process. They also may feel that you’re disrespecting their authority. If you’re concerned that your grades are not what you wanted them to be, talk to your teacher about how you can get better grades next time. Teaching can be difficult, and teachers get tired, just like you. If you notice that your teacher could use a hand, offer to help out. They’ll definitely notice and appreciate your helpful attitude.  You can help your teacher by erasing the board, passing out papers, or bringing something to the office for them. If you arrive to class early, you can always ask if there’s anything you can do to help them prepare for class. If your teacher has not been treating you fairly, it’s okay to approach them about it. Ask them if you can speak with them during lunch or after school. Even if right now it seems that your teacher hates you, being able to have a mature conversation with them will likely turn the tide. Your teacher will see that you're invested in the relationship and in the class.  Act calm and respectful when you speak to your teacher. You can say, “I’m not sure if you’ve noticed this, but I feel that I’m not being treated fairly in class.” It’s great to be able to give specific examples so your teacher can see what you’re talking about. You can say, “When Maria made a joke and the class laughed, you laughed too. But when I made a joke and everyone laughed you sent me to the office. I don’t feel like that’s fair.”

Summary:
Remember that your teacher has a life outside of school, too. Smile and act friendly. Accept the grades you’re given. Be helpful to your teacher. Talk to your teacher if you feel unfairly treated.