1. Anastasiou, D., Bergmann, K.: A gesture-speech corpus on a tangible interface. In: Proceedings of Multimodal Corpora Workshop, International Conference on Language Resources and Evaluation (2016)
2. Brooke, J.: SUS – a quick and dirty usability scale. In: Jordan, P.W., Thomas, B., Weerdmeester, B.A., McClelland, I.L. (eds.) Usability Evaluation in Industry. Taylor & Francis, London (1996)
3. Binkley, M., et al.: Defining twenty-first century skills. In: Griffin, P., McGaw, B., Care, E. (eds.) Assessment and Teaching of 21st Century Skills, pp. 17–66. Springer, Dordrecht (2012)
4. Csapó, B., et al.: Technological issues for computer-based assessment. In: Griffin, P., Care, E. (eds.) Assessment and Teaching of 21st Century Skills, pp. 143–230. Springer, Dordrecht (2012)
5. Dillenbourg, P.: What do you mean by collaborative learning. In: Collaborative-learning: Cognitive and Computational Approaches, vol. 1, pp. 1–15 (1999)