Capitalize when:
* Referring to specific courses: If you're talking about specific courses a person loves, capitalize them: "She loves taking English and History."
* Using them as proper nouns: If you're referring to the subjects as disciplines, they're often capitalized: "She's passionate about the study of English literature and History."
Don't capitalize when:
* Referring to the general subjects: If you're talking about subjects in general, don't capitalize: "She loves learning new things, especially English and history."
Example:
* "I took English and History in high school, but my favorite subject is Math." (Here, English and History are specific courses, while Math refers to the general subject)
In doubt?
If you're unsure, it's always a good idea to err on the side of capitalization, especially in academic writing.