Re:Duolingo Raises $45M, Now Valued at $470M
by ximeng on Wednesday June 10, 2015 @01:18PM
(#9693765)
Skritter will fix your Mandarin handwriting and tones if you use it regularly. https://news.ycombinator.com/user?id=nwinter who did it is now doing a game to teach coding invested in by ycombinator.
They do teach English to speakers of Chinese, Mandarin and Hindi.
[一] https://play.google.com/store/apps/details?id=com.chineseski...
[二] https://play.google.com/store/apps/details?id=com.pleco.chin...