There are two ways to leave a class. You either drop out, or you withdrawal. Dropping out usually means you are going to get a failing grade and you don't care about it. But primarily, dropping out refers to leaving college life altogether. So if you intend to say that you dropped out of a class, you should use withdrawal. There are several time periods for withdrawal. The first week, there is no penalty. The second week up to the first month, a W will show up on your transcript. And finally, withdrawal after the half way point will give you a failing grade. But this is dependent on each school policy. So learn the withdrawal format of your school. I was using the dates mentioned above only as an example. Let's learn some sentences to say these kinds of things.
I dropped out of my chemistry class.
I withdrew from my biology class.
I had too many classes as it is, so I dropped out of my statistics class.
I couldn't keep up with the schedule, so I dropped out of that class.
I couldn't understand the material, so I withdrew.
I hated the professor, so I just withdrew.
If you need to ask questions about withdrawal, these may help:
When is the last day to withdrawal?
If I withdrawal now, will it show up on my transcript?
Does a withdrawal look bad on the transcript?
How do I drop out of a class that I don't want to take anymore?
What is the procedure to withdrawal from class?
How do I withdrawal from a certain class?
Other things you might want to say when discussing this topic...
Are you sure you want to drop out of that class. You only have 4 more weeks. At least you can get the credit.
If I stay in that class, I'm going to screw up my GPA.
The best I can do is a C in this class. I don't want a C on my transcript. I'm going to withdrawal from the class.
If you get a bad grade, can't you just re-take the course?
Even if I retake the course, both grades are used. This school has a different system where re-taking the course doesn't really help.