2015 update: Unfortunately, this has come to an end, and the U.S. Foreign Service Institute has shut down its site. This was brought to my attention by Andrew from Remember.it Chinese, which is a resource worth checking out, along with the links for learning Chinese you’ll find on our Series page.
The U.S. Foreign Service Institute teaches foreign languages to government diplomats and foreign personnel – and its courses are now available online for free download. Chinese is just one of the 41 languages offered and the material comes in the form of audio, text, and tests to evaluate your progress.
This course is designed to give a practical command of spoken Standard Chinese. Nine situational modules form the core of the course. Each core module consists of tapes, a student textbook, and a workbook. In addition to the core modules, there is a resource module and eight optional modules.