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L.  Harbarth, Delsing, S., Richtscheid, F., Y\'fccepur, V., Feldmann, F., Akhavanfarm, M., Manske, S., Othlinghaus, J., and Hoppe, H. Ulrich, ?Learning by Tagging - Supporting Constructive Learning in Video-Based Environments?, in DeLFI 2018 - Die 16. E-Learning Fachtagung Informatik, Goethe-Universit\'e4t Frankfurt, 10.-13. September 2018., 2018, pp. 105?116.\par \par C.  Schneegass, Kizina, A., Manske, S., and Hoppe, H. Ulrich, ?Conceptcloud: supporting reflection in the online learning environment go-lab?, in DeLFI 2016 - Die 14. E-Learning Fachtagung Informatik, 11.-14. September 2016, Potsdam, 2016, pp. 83?88.\par \par J.  B\'f6rner, Buraczynska, J., G\'e4rtner, J., Nolte, K., Priesmeyer, J., \'dcstek, A., Stephan, C., Strasdat, S., Manske, S., and Hoppe, H. Ulrich, ?Fake or Real? Analyse physikalischer Ph\'e4nomene in viralen Videos im forschend-entdeckenden Lernkontext?, in DeLFI 2016 - Die 14. E-Learning Fachtagung Informatik, 11.-14. September 2016, Potsdam, 2016, pp. 89?94.\par \par S.  Manske, Hecking, T., Chounta, I. - A., Werneburg, S., and Hoppe, H. Ulrich, ?Using Differences to Make a Difference: A Study on Heterogeneity of Learning Groups?, in 11th International Conference on Computer Supported Collaborative Learning, CSCL 2015, Gothenburg, Sweden, June 7-11, 2015, 2015.\par \par }