Jeronen, E., Anttila-Muilu, S., & Jeronen, J. (2008). PROBLEMS AND CHALLENGES IN THE USAGE OF ICT IN BIOLOGY AND GEOGRAPHY IN SCHOOLS AND TEACHER EDUCATION IN FINLAND. Problems of Education in the 21st Century , Problems of Education in the 21st Century , 5. presented at the April/2008. Retrieved from http://oaji.net/articles/2017/457-1503128791.pdf

Panchabakesan, S. (2011). PROBLEMS AND PROSPECTIVES IN DISTANCE EDUCATION IN INDIA IN THE 21st CENTURY. Problems of Education in the 21st Century, Problems of Education in the 21st Century, 30. presented at the May/2011. doi:https://doi.org/10.33225/pec/11.30.113

Papotnik, A. (2009). PROBLEMS ENVIRONMENTAL EDUCATION CONNECTED WITH TECHNIC AND TECHNOLOGY. Problems of Education in the 21st Century , Problems of Education in the 21st Century , 14. presented at the October/2009. Retrieved from http://oaji.net/articles/2014/457-1393668671.pdf

Elstad, E., Turmo, A., & Guttersrud, Ø. (2011). PROBLEMS INDUCED BY AMALGAMATION OF PEDAGOGICAL PROGRESSIVISM AND EDUCATIONAL ACCOUNTABILITY: ORAL EXAMS WITH PRIOR PREPARATION TIME IN NORWEGIAN SECONDARY SCHOOLS. Problems of Education in the 21st Century, Problems of Education in the 21st Century, 30. presented at the May/2011. doi:https://doi.org/10.33225/pec/11.30.22

Prauliņš, A. (2007). PROBLEMS OF DEVELOPMENT OF MASTER DEGREE PROGRAM IN ACCOUNTING AT THE UNIVERSITY OF LATVIA. Problems of Education in the 21st Century , Problems of Education in the 21st Century , 2. presented at the September/2007. Retrieved from http://oaji.net/articles/2014/457-1392220714.pdf

Podzimek, M. (2019). PROBLEMS OF NARCISSISM IN EDUCATION: THE CULTURE OF NARCISSISM AS A DANGEROUS GLOBAL PHENOMENON FOR THE FUTURE. Problems of Education in the 21st Century, Problems of Education in the 21st Century, 77(4), Continuous. presented at the August/2019. doi:https://doi.org/10.33225/pec/19.77.489

Tsaurkubule, Z. (2008). PROBLEMS OF STRATEGIC PLANNING IN THE SYSTEM OF HIGHER EDUCATIONAL INSTITUTION OPERATING QUALITY MANAGEMENT. Problems of Education in the 21st Century , Problems of Education in the 21st Century , 7. presented at the June/2008. Retrieved from http://oaji.net/articles/2014/457-1392235987.pdf

Logashenko, O., & Lomakina, L. (2010). PROBLEMS OF STUDY AND STIMULATION OF STUDENTS-PSYCHOLOGISTS’ CREATIVE POTENTIAL. Problems of Education in the 21st Century, Problems of Education in the 21st Century, 25. presented at the November/2010. Retrieved from http://journals.indexcopernicus.com/abstract.php?icid=924391

Martinsone, K., Mihailovs, I., & Zakrizevska, M. (2008). THE PROBLEMS OF SUPERVISOR’S TRAINING IN LATVIA. Problems of Education in the 21st Century , Problems of Education in the 21st Century , 6. presented at the May/2008. Retrieved from http://oaji.net/articles/2014/457-1392234267.pdf

Ledesma-Perez, F. (2011). PROBLEMS SOLVING USING DIFFERENT REGISTERS OF REPRESENTATION. Problems of Education in the 21st Century, Problems of Education in the 21st Century, 36. presented at the December/2011. doi:https://doi.org/10.33225/pec/11.36.17

Eteokleous, N., & Christodoulou, N. (2010). THE PROCESS OF MULTICULTURAL EDUCATION IN A CENTRALIZED AND HOMOGENEOUS EDUCATIONAL SYSTEM. Problems of Education in the 21st Century , Problems of Education in the 21st Century , 21. presented at the June/2010. Retrieved from http://oaji.net/articles/2014/457-1400135650.pdf

Kugiejko, M. (2015). A PROFESIONAL SKILL SET OF A TEACHER AND UNIVERSITY LECTURER IN RELATION TO THE CAUSES AND PREVENTION OF JOB BURNOUT. Problems of Education in the 21st Century, Problems of Education in the 21st Century, 67, Discontinuous. presented at the October/2015. doi:https://doi.org/10.33225/pec/15.67.40

Kobalia, K., & Garakanidze, E. (2010). THE PROFESSIONAL COMPETENCIES OF THE 21ST CENTURY SCHOOL TEACHER. Problems of Education in the 21st Century , Problems of Education in the 21st Century , 20. presented at the April/2010. Retrieved from http://oaji.net/pdf.html?n=2014/457-1400134439.pdf

Alzahrani, M. A., & Nor, F. M. (2022). PROFESSIONAL DEVELOPMENT AND EFL TEACHERS’ PRACTICES IN ACTIVATING LEARNERS’ ACQUISITION OF 21ST CENTURY SKILLS . Problems of Education in the 21st Century, Problems of Education in the 21st Century, 80(5), Continuous. presented at the October/2022. doi:https://doi.org/10.33225/pec/22.80.652

Kirvalidze, M., & Lobzhanidze, S. (2023). PROFESSIONAL DEVELOPMENT AND PERFORMANCE ASSESSMENT SYSTEM FOCUSED ON STRENGTHENING TEACHERS’ COLLABORATION: THE CASE OF GEORGIA. Problems of Education in the 21st Century, Problems of Education in the 21st Century, 81(1), Continuous. presented at the February/2023. doi:https://doi.org/10.33225/pec/23.81.66

Celma, D., & Golubeva, A. (2010). PROFESSIONAL DEVELOPMENT OF STUDY PROGRAM MANAGERS: TOPICALITY AND ESSENCE. Problems of Education in the 21st Century , Problems of Education in the 21st Century , 20. presented at the April/2010. Retrieved from http://oaji.net/articles/2014/457-1400134293.pdf

Lomakina, L., & Logashenko, O. (2007). PROFESSIONAL SELF-DETERMINATION OF THE MODERN TEENAGER AS A PROBLEM OF EDUCATION. Problems of Education in the 21st Century , Problems of Education in the 21st Century , 2. presented at the September/2007. Retrieved from http://oaji.net/articles/2014/457-1392220439.pdf

Liepa, D., & Ratniece, I. (2013). PROFICIENCY INCREASE BY COLLABORATION WITHIN THE FOREIGN LANGUAGE STUDY PROCESS. Problems of Education in the 21st Century, Problems of Education in the 21st Century, 52. presented at the March/2013. doi:https://doi.org/10.33225/pec/13.52.48

Samuelsson, M., & Samuelsson, J. (2017). PROFICIENT CLASSROOM MANAGEMENT THROUGH FOCUSED MATHEMATIC TEACHING. Problems of Education in the 21st Century, Problems of Education in the 21st Century, 75(6), Continuous. presented at the December/2017. doi:https://doi.org/10.33225/pec/17.75.634

Novák, M. (2008). PROGRAMMING ONE’S OWN STAND-ALONE TEACHING AIDS FOR STUDENTS OF MATHEMATICAL SUBJECTS. Problems of Education in the 21st Century , Problems of Education in the 21st Century , 5. presented at the April/2008. Retrieved from http://oaji.net/articles/2014/457-1392224072.pdf

Zhikina, I., & Portyanskaya, I. (2009). THE PROJECT METHOD AS AN ALTERNATIVE TECHNIQUE OF TEACHING IN SECONDARY SCHOOL. Problems of Education in the 21st Century , Problems of Education in the 21st Century , 10. presented at the January/2009. Retrieved from http://oaji.net/articles/2014/457-1392315832.pdf

Jenisová, Z., Bílek, M., & Šranková, M. (2010). PROJECT ORIENTED CHEMISTRY INSTRUCTION AT A SLOVAK BASIC SCHOOL: LEARNERS´, TEACHERS´AND SCHOOL VISITORS´OPINION. Problems of Education in the 21st Century , Problems of Education in the 21st Century , 19. presented at the March/2010. Retrieved from http://oaji.net/articles/2014/457-1399917059.pdf

Mendoza, F., Gaeta, M., & Sedeño, V. (2013). PROMOTING BASIC COGNITIVE SKILLS THROUGH CONSTRUCTIVIST-BASED STRATEGIES IN A PHYSIOLOGY COURSE. Problems of Education in the 21st Century, Problems of Education in the 21st Century, 54. presented at the June/2013. doi:https://doi.org/10.33225/pec/13.54.53

Mozeika, D., Cedere, D., & Gedrovics, J. (2010). PROMOTING STUDENT LEARNING ACHIEVEMENTS IN CHEMISTRY BY USING THE TETRAHEDRAL SPATIAL MIND MODEL. Problems of Education in the 21st Century , Problems of Education in the 21st Century , 22. presented at the June/2010. Retrieved from http://oaji.net/articles/2014/457-1400515782.pdf

Harwell, D., & Daniel, M. (2012). PROMOTING TEACHER EFFECTIVENESS THROUGH A HOLISTIC WELLNESS MODEL. Problems of Education in the 21st Century, Problems of Education in the 21st Century, 40. presented at the March/2012. doi:https://doi.org/10.33225/pec/12.40.75