Schoolshape doesn't provide the ability to enter Chinese characters, but it is compatible with many ways of doing this.
We recommend installing Google pinyin
see http://www.laoshilink.org/laoshilink/GoogleIME.html.
MacOS has pinyin input built in!
see http://pinpinchinese.com/blog/how-to-use-pinyin-to-type-chinese-mac/
The iPad also has chinese input built in.
see http://panda-mom.blogspot.com/2011/11/chinese-characters-how-to-write-in.html