Looks like the Great Firewall or something like it is preventing you from completely loading www.skritter.com because it is hosted on Google App Engine, which is periodically blocked. Try instead our mirror:
This might also be caused by an internet filter, such as SafeEyes. If you have such a filter installed, try adding appspot.com to the list of allowed domains.
Independent from one another yet integrated into a whole, there are three courses in this set created for beginners: Intensive Spoken Chinese, The Most Common Chinese Radicals, and Rapid Literacy in Chinese. Thanks to Morgan for entering in the second half!
Rapid Literacy in Chinese. Written by 张朋朋 Zhang Pengpeng. Published in 2002 by Sinolingua. 136 pages. ISBN: 978-7800526954.