To learn Haskell I work through CIS 194 - Spring 2013 by Brent Yorgey, as recommended in https://github.com/bitemyapp/learnhaskell.
The author of the second link provides good reasons why he recommends this course here: http://bitemyapp.com/posts/2014-12-31-functional-education.html
Although I think they are for the course of 2014 or something, I sometimes take a look at this solutions as the assignments are often the same / similar. https://github.com/evansb/cis194-hw
Feel free to add a PR or contact me for any improvements etc.
For convenience I included the files for the homework assignments provided by the course. I did NOT create them.
Also the Lecture.hs include some codelines used in the lectures of
the course for testing.