1. Abrandt Dahlgren, M. (2000). Portraits of PBL: Course objectives and students study strategies in computer engineering, psychology and physiotherapy. Instructional Science, 28, 309–329.
2. Aff, J. (2006). Bildungsstandards versus Leistungsstandards in der beruflichen Bildung. Wissenplus, 24, 9–18.
3. Aiken, L., & West, S. G. (1991). Multiple regression: Testing and interpreting interactions. Newbury Park: Sage.
4. Bannert, M. (1998). Instructional design for problem-based learning: A case study in computer user training. In J. van Marrienboer & G. Koerkerke (Hrsg.), Instructional Design for Problem-Based Learning. Proceedings of the Third Workshop of the EARLI SIG Instructional Design (S. 75–98). University of Maastricht.
5. BMUKK. (2004). Lehrplan Biologie und Umweltkunde (Juli 2004). http://www.bmukk.gv.at/medienpool/11860/lp_neu_ahs_08.pdf . Zugegriffen: 20. Jan. 2014.