Chang, C. C., & Silalahi, S. M. (2017). A REVIEW AND CONTENT ANALYSIS OF MATHEMATICS TEXTBOOKS IN EDUCATIONAL RESEARCH. Problems of Education in the 21st Century, Problems of Education in the 21st Century, 75(3), Continuous. presented at the June/2017. doi:https://doi.org/10.33225/pec/17.75.235

Klim-Klimaszewska, A., & Nazaruk, S. (2017). THE SCOPE OF IMPLEMENTATION OF GEOMETRIC CONCEPTS IN SELECTED KINDERGARTENS IN POLAND. Problems of Education in the 21st Century, Problems of Education in the 21st Century, 75(4), Continuous. presented at the August/2017. doi:https://doi.org/10.33225/pec/17.75.345

Ngulube, B. (2020). UNDERGRADUATE ECONOMICS CURRICULUM AND EMPLOYABILITY SKILLS IN SOUTH AFRICA. Problems of Education in the 21st Century, Problems of Education in the 21st Century, 78(6), Continuous. presented at the December/2020. doi:https://doi.org/10.33225/pec/20.78.1000

Kurt, S. (2021). SECONDARY SCHOOL STUDENTS’ INTEREST IN PHYSICS, CHEMISTRY AND BIOLOGY CONCEPTS FROM DEVELOPMENTAL VIEW. Problems of Education in the 21st Century, Problems of Education in the 21st Century, 79(6), Continuous. presented at the December/2021. doi:https://doi.org/10.33225/pec/21.79.894

Memisevic, H., Biscevic, I., Hadzic, S., & Kuduzovic, A. (2023). EXPLORING CURRENT TRENDS IN EDUCATION: A REVIEW OF RESEARCH TOPICS IN THE PROBLEMS OF EDUCATION IN THE 21ST CENTURY JOURNAL. Problems of Education in the 21st Century, Problems of Education in the 21st Century, 81(2), Continuous. presented at the April/2023. doi:https://doi.org/10.33225/pec/23.81.258

Yayla, D., & Çalışkan, M. (2024). TRENDS AND PERSPECTIVES IN EDUCATIONAL NEUROSCIENCE STUDIES. Problems of Education in the 21st Century, Problems of Education in the 21st Century, 82(4), Continuous. presented at the August/2024. doi:https://doi.org/10.33225/pec/24.82.473