1. Arter, J.A. (1995). Portfolios for assessment and instruction. Eric Document Repr. ED 19950101.
2. Aysan, F., Tanrıöğen, G. & Tanrıöğen, A. (1996). Perceived causes of academic failure among the students at faculty of education at Buca. In Karagözoğlu, G. (Ed.). Teacher training for the twenty-first century, İzmir: Buca University Press.
3. Barootchi, N. & Keshavarz, M.H. (2002). Assessment of achievement through portfolios and teacher-made tests. Educational Research. 44 (3), 279-288.
4. Bujan, J. (1996). Increasing students’ responsibility for their own learning. Eric Document Repr. ED400072.
5. Büyüköztürk, Ş., (2001). Experimental design: pretest-posttest control group design and data analysis.Ankara: Pegama Press.