Chinese Writing 

http://www.learnnc.org/lp/editions/mandarin1/2.0 

2.1

http://www.learnnc.org/lp/editions/mandarin1/4535 

2.2

http://www.learnnc.org/lp/editions/mandarin1/4537

2.3

http://www.learnnc.org/lp/editions/mandarin1/4538

2.4

http://www.learnnc.org/lp/editions/mandarin1/4539