New Practical Chinese Reader (NPCR)
NPCR is a great course that I used myself during the first year of university. It's a beautiful textbook series with fun characters. A great place to start your journey into the magical world of Chinese (and it really is magical!).
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NPCR 1:
Textbook
The first of this great textbook series. Follow the characters as they get to grips with life in China.

NPCR 6:
Textbook
The sixth textbook in the series (I never finished this because I went on to other things. note to self- read this!)