Papageorgiou, K., Hassi, L., Bragos , R., Charosky, G., Leveratto, L. ., & Ramos, J. (2021). Prototyping the future of learning: reflections after seven iterations of Challenge-Based Innovation (2014-2020). CERN IdeaSquare Journal of Experimental Innovation, 5(1), 5–10. https://doi.org/10.23726/cij.2021.1290