Hi-hat notation is symbolized by the letter "x" with the stems pointing upward. Quarter-note hi-hat notation is just the x with the stem pointing upward, and for eighth notes, the x's are beamed together (a horizontal line connecting the tops of the stems). Find the hi-hat notation either on the top space of the staff or on the first line from the top, depending on how the composer is writing.
Find the snare drum notation on the third space from the bottom of the staff. The snare drum notation is a circle that's filled in so it's darkened. The stems for snare drum notation point downward.
Find the bass drum notation on the first space from the bottom of the staff. The bass drum notation is also a darkened circle with the stems pointing downward.