Kaltsas, A. 2021. MENTAL RESILIENCE IN EDUCATION: THE CASE OF GREEK HIGH SCHOOLS TEACHERS: Received: 2nd April 2021; Revised: 18th October 2021, 2nd December 2021; Accepted: 16th December 2021. PUPIL: International Journal of Teaching, Education and Learning. 5, 3 (Dec. 2021), 37–52. DOI:https://doi.org/10.20319/pijtel.2021.53.3752.