Each class has its own culture. Not always do the rebels, or the clowns, lead. Sometimes, you luck out. The majority want to learn, enjoy your lessons, praise you on teacher reviews, and prove your worth on standardized tests.
I wish all my classes were optimal.
The leaders pull along with the rest with a positive energy. The sloth gets motivated to study. The jabbermouth shuts up and listens. The clown, instead of throwing the class into disarray, shapes up.
In my experience, there isn’t much you can do to form the culture of the class. I’ve had groups that fought me tooth and nail and refused to learn. I’ve had students who have excelled and made me proud. What’s your experience?