1. Sülün Taş, A., Özel, S., & Yetkiner, E. Z. (2016, July). The effect of mathematics online review sessions through a webcast system on 5th-grade students’ mathematics achievement. Paper presented at the 13th conference of International Congress on Mathematical Education, Hamburg, Germany.
2. Yetkiner Özel, Z. E., & Özel, S. (2015, February). Problems with using GPAs to rank students from different programs. Paper presented at the 38th annual conference of Southwest Educational Research Association, San Antonio, TX.
3. Sülün Taş, A., & Özel, S. (2015, February). Webcast as a way to improve fifth grade students’ mathematics achievement and their attitudes toward mathematics. Paper presented at the 38th annual conference of Southwest Educational Research Association, San Antonio, TX.
4. Özel, S., Özerem, A., & İneci, E. (2014, September). Matematik dersinde yaratıcı dramanın yöntem olarak kullanılmasının öğrenci tutum ve başarısına etkisi [The effect of creative drama activities in mathematics classrooms on students’ attitudes and achievement]. Panel presented at XI National Science and Mathematics Education Congress, Adana, Turkey.
5. Özel, S., Yetkiner Özel, Z. E., Zientek, L. R., & Cory, B. (2014, September). Öğretmen adaylarının Van Hiele geometrik anlama düzeyleri: ABD ve Türkiye karşılaştırması [Pre-service teachers’ Van Hiele geometric understanding levels: US and Turkey comparison]. Panel presented at XI National Science and Mathematics Education Congress, Adana, Turkey.
6. Yetkiner Özel, Z. E., Zientek, L. R., & Özel, S. (2013, February). Flexible Teaching of Statistical Significance Testing & Confidence Intervals. Paper presented at the 36th annual conference of Southwest Educational Research Association, San Antonio, TX.
7. Mısır, M. E., Dönmez, A. B., Özel, S., & Yetkiner Özel, Z. E. (2013, February). A Content Analysis of Gender Roles in Turkish Science Textbooks. Paper presented at the 36th annual conference of Southwest Educational Research Association, San Antonio, TX.
8. Yetkiner Özel, Z. E., & Özel, S. (2013, February). Controversy on Statistical Significance Testing and Information on Some Alternative Reporting Strategies. Paper presented at the 36th annual conference of Southwest Educational Research Association, San Antonio, TX.
9. Özel, S., Yetkiner Özel, Z. E., Başol, B., Erdik, E., Eren, M., & Ölmez, İ. B. (2012, September). A Content Analysis of Gender Roles in Turkish Mathematics Textbooks. Paper presented at MEDCONF 2012: 7th Mediterranean Conference on Mathematics Education, Nicosia, Cyprus.
10. Çorlu, M. A., Adıgüzel, T., Ayar, M. C., Çorlu, M. S., & Özel, S. (2012, July). Bilim, Teknoloji, Mühendislik ve Matematik (BTMM) Eğitimi: Disiplinlerarası Çalışmalar ve Etkileşimler [Science, Technology, Engineering, and Mathematics (STEM) Education: Interdisciplinary Studies and Interactions]. Panel presented at X National Science and Mathematics Education Congress, Niğde, Turkey.
11. Matteson, S. M., Zientek, L. R., Özel, S., & Yetkiner, Z. E. (2012, February). Next Steps in Professional Development for Mathematics Teacher. Paper presented at the annual meeting of Southwest Educational Research Association, New Orleans, LA.
12. Özel, S., Yetkiner, Z. E., & Zientek, L. R. (2012, February). Van Hiele Levels of Geometric Understanding in Preservice Teachers. Paper presented at the annual meeting of Southwest Educational Research Association, New Orleans, LA.
13. *Erdik, E., & Özel, S.(2011, September). Matematik Başarısındaki Duygusal Değişkenlerin İncelenmesi. Paper presented at I. Eğitim Bilimleri Öğrenci Araştırmaları Sempozyumu, Kayseri, Turkey.
14. *Dönmez, A. B., & Özel, S.(2011, September). Perceived Social Support from Family, Friends and Class Teacher of 4th Grade Gifted Class Students. Paper presented at I. Eğitim Bilimleri Öğrenci Araştırmaları Sempozyumu, Kayseri, Turkey.
15. *Başol, B., & Özel, S. (2011, September). Okuduğunu Kavrama Becerisinin Matematik Problemlerini Çözme Üzerindeki Etkisi. Paper presented at I. Eğitim Bilimleri Öğrenci Araştırmaları Sempozyumu, Kayseri, Turkey.
16. Özel, S., & Yetkiner, Z. E. (2010, October). Multiple Representation Perspective and Students’ Acceptance of an Online Manipulative Tool. Paper presented at E-Learn, Orlando, FL.
17. Yetkiner, Z. E., & Özel, S. (2010, February). Effectiveness of OMT and students' technology acceptance. Paper presented at the annual meeting of Southwest Educational Research Association, New Orleans, LA.
18. Yetkiner, E. Z., & Özel, S. (2009, April). Turkish middle school students’ perspective on the equal sign. Paper presented at the American Educational Research Association, San Diego, CA.
19. Scheurich, J. J., Gonzalez, M. L., Dantley, M. E., Huggins, K. S., & Özel, S. (2009, April). Systemic institutional racism in U.S. schools and society: An innovative, multimedic, and interactive session. Paper presented at the American Educational Research Association, San Diego, CA.
20. Özel, S., Vural, O. F., & Adiguzel, T. (2009, February). Designing and developing virtual manipulatives for middle grade students. Paper presented at the 32nd annual conference of Southwest Educational Research Association, San Antonio, TX.
21. Özel, S. (2008, August). Using multiple representations in teaching and learning mathematics. Paper presented at the fourth conference of Young Researchers in European Society for Research in Mathematics Education, Trabzon, Turkey.
22. Özel, S., Capraro, R. M., & Yetkiner, E. Z. (2008, July). A technology intervention using multiple representations on mathematics. Paper presented at the 11th conference of International Congress on Mathematical Education, Monterrey, Mexico.
23. Özel, S. (2008, June). A virtual environment with multiple representations to teach fractions. Paper presented at the AECT Research Symposia, Instructional Design for Complex Learning: Exploring the Issues, Bloomington, Indiana.
24. Özel, S. (2008, February). Ways of resolution of cultural conflicts and dealing with multiculturalism. Paper presented at the 31st annual conference of Southwest Educational Research Association, New Orleans, LA.
25. Yetkiner, Z. E., & Özel, S. (2008, February). Understanding the one-parameter Rasch model: A spreadsheet approach. Paper presented at the 31st annual conference of Southwest Educational Research Association, New Orleans, LA.
26. Özel, S. (2007, September). Socratic seminar. Discussant at the annual meeting of the Association for Educational Communications and Technology, Anaheim, CA.
27. Zellner, R., Adiguzel, T., & Özel, S. (2006, October). Digitized video research tools: Integrated resources for data collection, content analyses, and transcription. Paper presented at the annual meeting of the Association for Educational Communications and Technology, Dallas, TX.
28. Cifuentes, L., & Özel, S. (2006, June). Designing instruction for international learners. A concurrent session for the National Educational Computing Conference of the International Society for Technology in Education, San Diego, CA.
29. Adiguzel, T., Zellner, R., & Özel, S. (2006, June). Revolutionizing reusable adaptive learning objects: Software for cross-platform development and delivery. Paper presented at the annual meeting of the World Conference on Educational Multimedia, Hypermedia & Telecommunications, Orlando, FL.
30. Zellner, R., Adiguzel, T., & Özel, S. (2006, February). Embedded video: Creating, managing, accessing, and optimizing the resources in digitized video. Paper presented at the annual meeting of the Teaching with Technology Conference (TWTC), College Station, TX.
31. Zellner, R., Özel, S., & Adiguzel, T. (2006, February). Maintaining online course management systems: Local and institutional issues of development and delivery. Paper presented at the annual meeting of the Teaching with Technology Conference (TWTC), College Station, TX.
32. Zellner, R., Peden, E., Özel, S., & Adiguzel, T. (2005, October) Embedded video: Creating, managing, accessing, and optimizing the resource in digitized video. A concurrent session for the International Association for Educational Communications and Technology, Orlando, FL.
33. Özel, S. (2001, September). Determining and assessing children’s image of science and scientists. A poster presentation for the Science Education Congress, Istanbul, Turkey.