You can either download the .ggb file alone or the complete webpage for students with tasks.
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Werner Pronkow March 1, 2016 - 8:35 PM
April 12, 2018 - 2:08 PM 36 resources — swjnmang
March 1, 2016 - 8:35 PM 14 resources — pronkow
August 28, 2018 - 11:06 AM 36 resources — Christian Conradi