Not all shade is the same (teacher information)
Teaching methods for teachers on the worksheet of the same name.
The scientific background on the task and possible variations are provided.
The six incremental hints for the task are provided with the corresponding answers. They are also available as a separate ready-to-print medium named “Not all shade is the same (hints for printing)” or as an interactive medium named “Not all shade is the same (interactive hints)” on the media portal of the Siemens Stiftung.