"I like classes."
A mi me is a more complicated version of "mi," meaning "I." The verb "gustar" is to like something, and comes in two different forms.
These two forms are gusta and gustan, by the way.
Now, clase means class, and if you make it plural, it is clases.
Finally add all of these together and you get "I like classes."
If you want to be more specific, add the class to it. Ex. "Me gustan mis clases de matemáticas."
But the true english translation is "I like classes." Hope this helps!
