There is a guideline, as well as examples for the teachers. For example, in http://12cur.naer.edu.tw/download/fileList in the Chinese class, how to issue written homeworks that emphasizes the character of comprehension, of not memorization, but the complete understanding and so on, so that there is actually materials provided by the curriculum committee, the documents and records part, specifically for those different teachers to adapt their way of doing written homeworks, or any design like this.