Tips and notes
I'm a bloody beginner, so the "Tips and notes" are very helpful to explain rules and specific items that differ from English. That it's possible to copy-paste is helpful too. Could it be improved like: 1. have a separate section/tab where I could find all the "Tips and notes" organized similar to the learning modules. 2. few tips cannot be copied and disappear after few seconds so it's often not even possible to get the whole content 3. get a link or a recommendation on which base duolingo is working/set-up. E.g. just now I have an open question when to use por and when to use para. Of course I'll find the answer in the net somewhere, but I'd like to have the answer from duolingo or a partnering organization. Thanks for your considering in a positive way.
The tips and notes idea is a good one. In the meantime, here is a link to a different web site that you might find helpful: http://www.spanishdict.com/grammar It's not organized into sections relevant to the particular learning module you're doing in Duolingo, of course, but it is very helpful nonetheless.