Ainsworth, S., Oldfield, J. (2019). ‘Quantifying teacher resilience: Context matters’. Teaching and Teacher Education, 82, pp. 117-128. Beltman, S., Mansfield, C., Price, A. (2011). Thriving not just surviving: A review of research on teacher resilience. Educational Research Review, 6(3), pp. 185-207. Bowen, G.A. (2009). Document analysis as a qualitative research method. Qualitative Research Journal, 9(2), pp. 27-40. doi:10.3316/QRJ0902027. Braun, V., Clarke, V. (2006). Using thematic analysis in psychology. Qualitative Research in Psychology, 3, pp.77–101. doi:10.1191/14780 8870qp063oa. Bryman, A. (2012). Social research methods (4th edition). Oxford: Oxford University Press. Creswell, J. (2003). Research Design: Qualitative, Quantitative, and Mixed Methods Approaches (2nd edition). Thousand Oaks, CA: SAGE Publications, Inc. Day, C. (2014). Conducting research on school principals: ISSPP member’s guide. Nottingham. 100 Joanna Madalińska-Michalak Day, C., Gu, Q. (2014). Resilient teachers, resilient schools. New York, NY: Routledge. Day, C., Leithwood, K. (eds.). (2007). Successful Principal Leadership in Times of Change. An International Perspective. Studies in Educational Leadership, Vol 5, Springer. Day, C., Harris, A., Hadfield, M., Tolley H. Beresford, J. (2000). Leading schools in times of change. Philadelphia: Open University Press. Day, C., Sammons, P., Leithwood, K., Hopkins, D., Harris, A., Gu, Q., Brown, E. (2010). Ten strong claims about successful school leadership. Nottingham: The National College for School Leadership. Denscombe, M. (2007). The good research guide for small scale social research projects (3rd edition). Berkshire, UK: Open University Press. European Commission/EACEA/Eurydice (2019). Digital Education at School in Europe. Eurydice Report. Luxembourg: Publications Office of the European Union. Flick, U. (2014). The SAGE handbook of qualitative data analysis. London: SAGE Publications. Gu, Q., Day, C. (2013). Challenges to teacher resilience: Conditions count. British Educational Research Journal, 39(1), pp. 22-44. doi:10.1080/01411926.2011.623 GUS. (2019). Oświata i wychowanie w roku szkolnym 2018/2019 [Education in the 2018/2019 school year], Warszawa – Gdańsk: Statistic Poland and Statistical Office in Gdańsk. Hallinger, P., Huber, S.G. (2012). School leadership that makes a difference: international perspectives. School Effectiveness and School Improvement, (23)4, pp.1-9. Hitt, D., Tucker, P. (2016). Systematic review of key leadership practices found to influence student achievement: A unified framework. Review of Educational Research, 86(2), pp. 531–569. Leithwood, K. (2012). The Ontario Leadership Framework with a discussion of its research foundations. Toronto: Institute for Educational Leadership. Leithwood, K., Riehl, C. (2005). What we know about successful school leadership. In W. Firestone C. Riehl (eds.), A new agenda: Directions for research on educationalleadership (pp. 22-47). New York, NY: Teachers College Press. Leithwood, K., Harris, A., Hopkins, D. (2008). Seven strong claims about successful school leadership, School Leadership and Management, 28(1), pp. 27-42. Leithwood, K., Sun, J., Pollock, K. (eds.). (2017). How School Leaders Contribute to Student Success. The Four Paths Framework, Studies in Educational Leadership, Vol 23, Springer. Mansfield, C.F., Beltman, S., Price, A. McConney, S. (2012). Don’t sweat the small stuff: Understanding resilience at the chalkface. Teaching and Teacher Education, 28(3), pp. 357-367. Mansfield, C.F., Beltman, S., Broadley, T., Weatherby-Fell, N. (2016). Building Resilience in Teacher Education: An evidenced informed framework. Teaching and Teacher Education, 54, pp.77-87. doi:10.1016/j.tate.2015.11.016. Murphy, J., Elliot, S., Goldring, E., Porter, A. (2006). Learning-centered leadership: A conceptua lfoundation. New York: Wallace Foundation. O’Leary, Z. (2014). The essential guide to doing your research project (2nd edition). Thousand Oaks, CA: SAGE Publications, Inc. Papatraianou, L.H., Le Corne, R. (2014). Problematizing the role of personal and professional relationships in early career teacher resilience. Australian Journal of Teacher Education, 39(1), pp. 100-116. Peters, J., Pearce, J. (2012). Relationships and early career teacher resilience: A role for school principals. Teachers and Teaching: Theory and Practice, 18(2), pp. 249-262. doi:10.1080/13540602.2012.632266. Sebring, P., Allensworth, E., Bryk, A., Easton, J., Luppescu, S. (2006). The essential supports for school improvement. Chicago: Consortium on Chicago School Research. Ungar, M. (2012). Social ecologies and their contribution to resilience. In: M. Ungar (ed.), The social ecology of resilience: A handbook of theory and practice, (pp. 13-31). Springer Science+Business Media.