Kanji in DuoLingo
What I've noticed when using this course is that Kanji is not easy to decipher or remember. I think that Duolingo should spend more time on making sure people know what they are learning is kanji. Also, basing a lesson on a primitive and then showing some kanji with that primitive would be helpful. Besides that, I think this is a great way to learn the japanese language. Props goes out to the people that helped create this course. I hope more people will be able to learn this beautiful language because of this app.
As somebody who has studied Japanese for 3 years but only recently started duolingo, I have to say the only way to remember them is to write them. Download the free app "Kanji study" as it helps a ton. Also, a book that I heard was very helpful but have not tried is called "Remembering the Kanji". Every foreigner that I know who can read kanji has used it.