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Rodríguez, F. M. M. (2012). VOCATIONAL APTITUDE FOR YOUNG UNEMPLOYED. Problems of Education in the 21st Century, Problems of Education in the 21st Century, 44. presented at the July/2012. doi:https://doi.org/10.33225/pec/12.44.53

Bussotti, P. (2013). VITTORIO CHECCUCCI AND HIS CONTRIBUTIONS TO MATHEMATICS EDUCATION: A HISTORICAL OVERVIEW. Problems of Education in the 21st Century, Problems of Education in the 21st Century, 53. presented at the April/2013. doi:https://doi.org/10.33225/pec/13.53.22

Bilbokaitė, R. (2009). VISUALIZATION IN SCIENCE EDUCATION: THE RESULTS OF PILOT RESEARCH IN GRADE 10. Problems of Education in the 21st Century , Problems of Education in the 21st Century , 16. presented at the November/2009. Retrieved from http://oaji.net/articles/2014/457-1396706997.pdf

Lakhvich, T. (2012). VISUALISATION-ASSISTED TEACHING: CAN VIRTUAL GIVE RISE TO REAL KNOWLEDGE?. Problems of Education in the 21st Century, Problems of Education in the 21st Century, 42. presented at the May/2012. doi:https://doi.org/10.33225/pec/12.42.05

Ferreira, C., Baptista, M., & Arroio, A. (2011). VISUAL TOOLS IN TEACHING LEARNING SEQUENCES FOR SCIENCE EDUCATION. Problems of Education in the 21st Century, Problems of Education in the 21st Century, 37. presented at the December/2011. doi:https://doi.org/10.33225/pec/11.37.48

Kordigel Aberšek, M. (2008). VISUAL LITERACY – ONE OF 21ST CENTURY LITERACIES FOR SCIENCE TEACHING AND LEARNING. 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/2017/457-1503128163.pdf

Schröttner, B. (2008). VISIONARY EDUCATIONAL CONCEPTS FOR GLOBAL CHALLENGES: GLOBAL AND PEACE EDUCATION. Problems of Education in the 21st Century , Problems of Education in the 21st Century , 8. presented at the October/2008. Retrieved from http://oaji.net/articles/2014/457-1392284675.pdf

Bílek, M., Šimonová, I., & Lašek, J. (2010). VIRTUAL LEARNING ENVIRONMENT AS A SUBJECT OF CURRENT RESEARCH PROJECTS AT UNIVERSITY OF HRADEC KRÁLOVÉ. Problems of Education in the 21st Century , Problems of Education in the 21st Century , 23. presented at the July/2010. Retrieved from https://journals.indexcopernicus.com/search/article?articleId=2594592

Silva, A. B., Abrantes, C., Oliveira, E., Chumbo, C., Silva, A. A., & Silva, M. J. (2010). VIRTUAL AND PHYSICAL RESOURCES: A CASE OF SYNERGY IN STUDYING TIDES AND ROTATION. Problems of Education in the 21st Century , Problems of Education in the 21st Century , 24. presented at the October/2010. Retrieved from https://journals.indexcopernicus.com/search/article?articleId=2594531

Soares, M., & Machado, L. (2014). VIOLENCE AGAINST TEACHERS: SPEECHES FROM BRAZILIAN’S DIGITAL MEDIA. Problems of Education in the 21st Century, Problems of Education in the 21st Century, 58, Discontinuous. presented at the March/2014. doi:https://doi.org/10.33225/pec/14.58.144

Colagrande, E. A., de Martorano, S. A. A., & Arroio, A. (2017). VIEWS OF A GROUP OF PRE-SERVICE SCIENCE TEACHERS ON THE USE OF EXPERIMENTAL ACTIVITIES IN SCIENCE 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/17.75.525

Dimova, Y., Angelova, T., & Roussev, E. (2009). VERBAL ASSOCIATIONS OF BULGARIAN TEENAGERS FOR ‘NATURE’. Problems of Education in the 21st Century , Problems of Education in the 21st Century , 11. presented at the May/2009. Retrieved from http://oaji.net/articles/2014/457-1392408208.pdf

Holmqvist, M., & Mattisson, J. (2008). VARIATION THEORY: A TOOL TO ANALYSE AND DEVELOP LEARNING AT SCHOOL. 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/2014/457-1392234817.pdf

Arroio, A. (2020). THE VALUE OF EDUCATION IN THE CONTEXT OF COVID-19 PANDEMIC. Problems of Education in the 21st Century, Problems of Education in the 21st Century, 78(3), Continuous. presented at the June/2020. doi:https://doi.org/10.33225/pec/20.78.309

Schröttner, B. (2008). THE VALUE OF DATA IN ETHNOGRAPHICAL RESEARCH. 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/2014/457-1392235470.pdf