You can either download the .ggb file alone or the complete webpage for students with tasks.
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Serlo Education — September 7, 2015 - 7:45 AM
July 4, 2017 - 12:53 PM 10 resources — lehrerL12
August 18, 2016 - 9:32 AM 4 resources — serlo.org
September 8, 2015 - 12:16 PM 7 resources — serlo.org
