You can either download the .ggb file alone or the complete webpage for students with tasks.
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Serlo Education — 1 September 2016 - 13:01
1 February 2017 - 21:30 28 resources — Poeck
22 January 2022 - 21:30 14 resources — Hegius
26 August 2019 - 15:49 31 resources — Christian Conradi
