The Massachusetts Institute of Technology’s OpenCourseWare makes available selections from the teaching materials for more than one thousand MIT courses. Some of these, such as those in linguistics, may be of particular interest to readers of Pinyin News.

MIT also makes available much of the material from its classes on languages, including those for Mandarin:

• Chinese I (Regular)
• Chinese II
• Chinese III (Regular)
• Chinese IV (Regular)
• Chinese V (Regular)
• Chinese VI (Regular)
• Chinese I (Streamlined)
• Chinese II (Streamlined)
• Chinese III (Streamlined)
• Chinese IV (Streamlined)
• Chinese VI (Streamlined)

and Japanese:

• Beginning Japanese I
• Beginning Japanese II
• Intermediate Japanese I

Many of these sections include audio and even video.

source: link spotted in Forumosa’s “learning Chinese” forum.