1. American Statistical Association: 1985, Guidelines for the Teaching of Statistics within the K-12 Mathematics Curriculum, Joint Committee on the Curriculum in Statistics and Probability of the American Statistical Association and the National Council of Teachers of Mathematics, Washington DC.
2. Dinges, H.: 1981, ‘Zum Wahrscheinlichkeitsbegriff für die Schule’ in W. Dörfler and R. Fischer (eds.), Stochastik im Schulunterricht, Hölder-Pichler-Tempsky, Vienna, 49–61.
3. Eisner, E.: 1979, ‘Five Basic Orientations to the Curriculum’, in The Educational Imagination, MacMillan Co., New York.
4. Freudenthal, H.: 1973, Mathematics as an Educational Task, Reidel, Dordrecht.
5. Garfïeld, J. and A. Ahlgren: 1987, ‘Evaluation of the Quantitative Literacy Project: Teacher and Student Surveys’, American Statistical Association, Washington DC.