The mathematics curriculum often provides for relatively few mathematical thinking problems or non-routine problems that focus on a deepening of understanding mathematical concepts and the problem-solving process. To develop such problems, methods are required to evaluate their suitability. The purpose of this preliminary study was to find such an…

Despite the advocated importance of twenty-first century competences in education, it appears that they are not systematically integrated in national curricula, school curricula and classroom activities. Potential explanations can be found in the current ambiguity of definitions for twenty-first century competences and the absence of educational…