Creswell, J. W., & Creswell, J. D. (2018). Research Design: Qualitative, Quantitative, and Mixed Methods Approaches (5th ed.). Los Angeles: Sage Pubn.
Dalin, P. (1998). School Development - Theories and Strategies. London: Cassel.
Fullan, M. (2008). From School Effectiveness to School Improvement - An Inevitable Conceptual Evolution. Journal Für Schulentwicklung, Theorie(2), 64.
Harris, A., Day, C., Hopkins, D., Hadfield, M., Hargreaves, A., & Chapman, C. (2013). Effective Leadership for School Improvement. Routledge.
Mayring, P. (2015). Qualitative Content Analysis: Theoretical Background and Procedures. In A. Bikner-Ahsbahs, C. Knipping, & N. Presmeg (Eds.), Approaches to Qualitative Research in Mathematics Education (pp. 365–380). Springer Netherlands.
OECD. (2016). Innovating Education and Educating for Innovation. Paris: OECD.
Saillard, E. K. (2011). Systematic Versus Interpretive Analysis with Two CAQDAS Packages: NVivo and MAXQDA. Forum Qualitative Sozialforschung / Forum: Qualitative Social Research, 12(1).
Voogt, J., Knezek, G., Christensen, R. & Lai, K.-W. (Hrsg.). (2018). Second Handbook of Information Technology in Primary and Secondary Education. Cham: Springer Nature; Springer.