1. https://www.emergingedtech.com/2015/04/examples-of-transforming-lessons-through-samr/
2. https://www.edutopia.org/articles/model-understanding-good-tech-integration
3. https://creately.com/blog/tools/online-teaching-tools
4. Allen, I., Seaman, J.: In: Grade Change: In the United States Monitoring Online Learning. Wellesley MA, Babson College/Sloan Foundation (2014)
5. Barnard, R.: Identifying bias in distance education study meta-analysis: broad photos that can be focused on distance education. 35(3) (2014)