Maybe have a practice that you can specificly practice spelling on ipod app? I have a friend who keeps spelling the same words wrong and I think this would be a good idea just to try help people memorise the spelling of extra long words as well.
Thanks for the suggestion! You can go into your vocabulary and practice specific words (click on what you'd like to brush up on and click 'practice word'). You'll be able to practice words in the context of sentences/translations.
I, too, would like a direct spelling practice. I don't code, so I have no idea how difficult it would be for Duolingo to highlight words I spell wrong and make me a spelling list, so to speak. I'm working on Spanish adverbs right now and all the words that are similar to English words, but just enough different . . . AGG! :-)