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.
As China's fast economic development and the Shanghai World Expo, Chinese language is getting more and more popular globally. This series aims to help foreigners master the basic knowledge of Chinese in a short time to be able to communicate with the locals as soon as possible.
Our Chinese Classroom, written by Xu Wen Jing. Published in 2011 by Shanghai Translation Publishing House. Contains 10 lessons and 418 words. ISBN:978-7-5327-5381-9