This volume contains selected papers submitted to the 21st Annual International Conference of the Bulgarian Comparative Education Society (BCES), held in Sofia, Bulgaria, in June 2023. The Conference theme was "Recovering Education: Using the Experiences and Learning Acquired to Build New and Better Education Systems." The theme focuses on the current post-pandemic period which provides excellent opportunities for looking at the past three to four years, filled with disappointments, damages, and lessons learnt, and direct attention to hopes, efforts, and prospects to recover. This volume includes 41 papers -- an introductory piece and 40 papers divided into 6 parts representing the BCES Conference thematic sections: (1) Comparative and International Education & History of Education; (2) International Education Issues; (3) School Education: Policies, Innovations, Practices & Entrepreneurship; (4) Higher Education & Teacher Education and Training; (5) Law and Education; and (6) Research Education & Research Practice. [Individual papers are indexed in ERIC.]