It'd be awesome if there was an option to print out 'lesson notes' - basically a list of all the new words and grammar - after each level :)
Oh! Modern times! Why don't just use notebook and pencil? Listening, hearing, speaking and don't forget writing are all very important parts of learning process. I'm not sure about the precise percentage that each has with final knowledge but few years back in some newspaper i read the article about learning. It said something that, for example, when you read you absorb knowledge with I don't know, let's say 50%, when you hear something it has better percentage, and so on. On that scale, writing is I think somewhere in the middle, so don't skip it.
I totally agree with Hazablad. Write down your own notes. Duolingo can do a lot, but cannot do everyhting for us. Besides, there is already a summary for each module and a vocabulary list.
I agree Joannanana! I would also like to print out notes. I have arthritis in my hands which prevents me from writing down anything lengthy.
I read that "How we learn" info a long time ago. I will have to see if I can find it. Its quite interesting. I've been "teaching" my family what I learn on duoling just to help me get it in my brain.