The Harvard CS50 course on edx does a pretty good job of teaching C, esp if you do the recommended reading/psets of "hacker level" which is from the book Hacker's Delight 2.
There is some initial magic, where they have you import cs50.h which is full of black box functions in the beginning but other than that it's a good example of teaching beginner C.
There is some initial magic, where they have you import cs50.h which is full of black box functions in the beginning but other than that it's a good example of teaching beginner C.