Välijärvi, J., Linnakylä, P., Kupari, P., Reinikainen, P., Sulkunen, S., Töörnroos, J. & Arffman, I. 2003. The Finnish Success in PISA and Some Reasons behind it.
Available at: http://ktl.jyu.fi/img/portal/8302/PISA_2003_screen.pdf

Detailed results of the PISA 2006 studies can be found at:

University of Helsinki, Centre for Educational Assessment. PISA results 2006. http://www.pisa2006.helsinki.fi/finland_pisa/results/2006/2006.htm

Other supplementary material is presented attached to the lectures they are discussed.