A class of diffuculty Closed

When Luke enters the potions class with his classmates, He goes to his couldron and so does the others.
They listen to the potions professor for a while.
Hey, Do you think this will be easy? Said classmate 1
Not at all, Mate. I thnk this will be over hard. Said classmate 2
I think this will be okay if we listen carefully. Said Luke to the others
What? Mate, Wait until you try making a potion because its hard. Said Classmate 2
Yeah, you wait. Said Classmate 1.
Fine. Luke said.
And then they continued to listen to the professor and then the professor tells them to make potions now. Then they start.
After some time, Luke and some of them are on the right track and the rest fail and some exploded their couldron,
Then the time ends. The professor checks all our couldrons.
Luke and some others Pass and classmate 1 and 2 and the others failed the potion making.
The failed students looked at me and the other passing students in shock.
I told you it will be okay if you listen carefully! Said Luke while smiling proudly of himself
Dont worry, that was just luck. Said classmate 1.
Yeah! It could have been just your lucky day. Said classmate 2.
Potions class end.
All the others leave and lastly Luke gets his things and then he leaves the class and walks through the calm and peaceful hall.