My children learn to spell by reading, writing, and asking questions as they go. Riley and I helped Seth (9) download lots of music today. If I made a spelling list out of the words he asked about (either asked how to spell or asked us to confirm that he had spelled correctly) while searching for songs today, it would look like this:
rock n roll
Side note: My spellcheck was ok with "rock n roll" and "Jagger" but not "Skrillex"