Aydın Gürler, S., & Kaplan, O. (2026). THE EFFECT OF SCHOOL BULLYING ON SCIENCE ACHIEVEMENT AND COGNITIVE APPRAISALS. Problems of Education in the 21st Century, Problems of Education in the 21st Century, 84(1), continuous. presented at the February/2026. doi:https://doi.org/10.33225/pec/26.84.07

Candia, L. A., & Lay, Y. F. (2025). ATTITUDES TOWARD SCIENCE AS MEDIATORS BETWEEN PERCEPTIONS OF CLASSROOM ENVIRONMENT, FAMILY INVOLVEMENT, SELF-EFFICACY, AND SCIENCE ACHIEVEMENT. Problems of Education in the 21st Century, Problems of Education in the 21st Century, 83(1), Continuous. presented at the February/2025. doi:https://doi.org/10.33225/pec/25.83.30

Lay, Y. F., & Ng, K. T. (2021). CORRELATES OF SCIENCE CLASSROOM TEACHING WITH SOUTHEAST ASIAN AND EAST ASIAN EIGHTH GRADERS’ SCIENCE ACHIEVEMENT IN TIMSS 2015 . Problems of Education in the 21st Century, Problems of Education in the 21st Century, 79(3), Continuous. presented at the June/2021. doi:https://doi.org/10.33225/pec/21.79.425

Lay, Y. F., & Rajoo, M. (2020). AFFECTIVE FACTORS CONTRIBUTING TO SOUTHEAST ASIAN AND EAST ASIAN EIGHTH GRADERS’ SCIENCE ACHIEVEMENT IN TIMSS 2015. Problems of Education in the 21st Century, Problems of Education in the 21st Century, 78(6A), Continuous. presented at the December/2020. doi:https://doi.org/10.33225/pec/20.78.1107