In American English, yes, you would. They would be kind of considered proper nouns.

I would agree with Luella.

There seems to be some disagreement. In this context, you would not capitalize them because they're simply subject names. If they were official names for the course such as "Science 101" or "Music 120" then they would be capitalized. But, because you're only referencing the subjects generally, they would not be capitalized.