152 官話 (Chinese)
Elementary Chinese 1 (CC BY-NC-SA)
Elementary Chinese 1 is the first half of a two-semester Mandarin Chinese course that aims to help beginners develop communicative competence in the basic four skills (listening, speaking, reading and writing) and culture of Chinese.
地下水 (CC BY-NC-ND)
A Chinese version of the groundwater hydrology textbook Groundwater by Allan Freeze and John Cherry, which was originally published in 1979.
MIT BLOSSOMS Videos (CC BY-NC-SA)
Math and science videos for high school classes in Mandarin.