Important Hanja: 학 (學) (한자) | Korean FAQ
Have you ever seen the Hanja 學 before? It's read as 학, and it means "to study" or "to learn." You might know the word 학교, but this Hanja also appears at the end of many words as well to mean "the study of" that word.
Let me know what other sorts of Hanja you'd like to learn! I can continue adding more Hanja to this series, or I could even make a separate series that teaches Hanja someday.