1.       Memiş, R., Özel S., & Özcan, M. (2014). Mathematics teachers’ attitudes towards the integration of technology into mathematics classes. In H. Arslan, G. Rata, E. Kocayörük, & M. A. İçbay (Eds.), Multidisciplinary Perspectives on Education (pp. 145-152). New Castle, UK: Cambridge Scholars.

2.       Özel, S. (2012). Utilizing cognitive resources in user interface designs. In B. Khan (Ed.), User interface design for virtual environments: Challenges and advances (pp. 115-123). Hershey, PA: IGI Global.

3.       Özel, S., & Özel Yetkiner, Z. E (2011). Digital book readers. In S. J. Greenwald & J. E. Thomley (Eds.), Encyclopedia of mathematics and society (pp. 303-304). Pasadena, CA: Salem Press.

4.       Özel, S., & Özel Yetkiner, Z. E (2011). Representations in society. In S. J. Greenwald & J. E. Thomley (Eds.), Encyclopedia of mathematics and society (pp. 863-868). Pasadena, CA: Salem Press.

5.       Özel Yetkiner, Z. E, & Özel, S. (2011). Communication in society. In S. J. Greenwald & J. E. Thomley (Eds.), Encyclopedia of mathematics and society (pp. 219-225). Pasadena, CA: Salem Press.

6.       Özel Yetkiner, Z. E, & Özel, S. (2011). Measurement in society. In S. J. Greenwald & J. E. Thomley (Eds.), Encyclopedia of mathematics and society (pp. 640-645). Pasadena, CA: Salem Press.

7.       Yetkiner, Z. E, & Özel, S. (2010). One-tailed test. In N. J. Salkind (Ed.), Encyclopedia of research design (969-971). Thousand Oaks, CA: Sage.

8.       Stitt, J. R., & Özel, S. (2010). Intorduction to Geographical Information Systems (GIS). In R. M. Capraro, M. M. Capraro, J. Morgan, & J. Scheurich (Eds.), A companion to interdisciplinary STEM project-based learning: For teachers by teachers (pp. 27-34). Rotterdam, the Netherlands: Sense.

9.       Stitt, J. R., & Özel, S. (2010). Intro to AutoCAD: Say goodbye to winter. In R. M. Capraro, M. M. Capraro, J. Morgan, & J. Scheurich (Eds.), A companion to interdisciplinary STEM project-based learning: For teachers by teachers (pp. 43-48). Rotterdam, the Netherlands: Sense.

10.   Stitt, J. R., & Özel, S. (2010). Geographical Information Systems (GIS): Define the world as you see it. In R. M. Capraro, M. M. Capraro, J. Morgan, & J. Scheurich (Eds.), A companion to interdisciplinary STEM project-based learning: For teachers by teachers (pp. 127-132). Rotterdam, the Netherlands: Sense.

11.   Stitt, J. R., & Özel, S. (2010). Geographical Information Systems (GIS): Neighborhood project. In R. M. Capraro, M. M. Capraro, J. Morgan, & J. Scheurich (Eds.), A companion to interdisciplinary STEM project-based learning: For teachers by teachers (pp. 133-138). Rotterdam, the Netherlands: Sense.

12.   Stitt, J. R., & Özel, S. (2010). Geographical Information Systems (GIS) and the business models. In R. M. Capraro, M. M. Capraro, J. Morgan, & J. Scheurich (Eds.), A companion to interdisciplinary STEM project-based learning: For teachers by teachers (pp. 145-153). Rotterdam, the Netherlands: Sense.

13.   Stitt, J. R., & Özel, S. (2010). Is our library floor plan conducive for learning? In R. M. Capraro, M. M. Capraro, J. Morgan, & J. Scheurich (Eds.), A companion to interdisciplinary STEM project-based learning: For teachers by teachers (pp. 155-161). Rotterdam, the Netherlands: Sense.

14.   Özel, S., Yetkiner, Z. E., Capraro, R. M., & Kupcu, A. R. (2009). Young adolescent education in Turkey. In S. B. Mertens, V. Anfara, & K. Roney (Eds.), An international look at educating young adolescent (pp. 1-23). Charlotte, NC: Information Age.

15.   Cifuentes, L., & Özel, S. (2009). Using technologies to support STEM project-based learning. In R. M. Capraro & S. W. Slough (Eds.), Project-based learning: An integrated sciences, technology, engineering, and mathematics (STEM) approach (pp. 67-78). Rotterdam, the Netherlands: Sense.

16.   Özel, S. (2009). W3 of STEM PBL. In R. M. Capraro & S. W. Slough (Eds.), Project-based learning: An integrated sciences, technology, engineering, and mathematics (STEM) approach (pp. 117-134). Rotterdam, the Netherlands: Sense.