Mathematics education in Finnish secondary schools. (English)
Stedøy, Ingvill M., Mathematics education - The Nordic way. Norges Teknisk-Naturvitenskapelige Univ., Trondheim (ISBN 82-471-6013-7). 19-31 (2004).
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What on earth is a straight line? What can we learn from an epistemological episode in eighth grade? (English)
Nord. Mat.didakt. 2, No. 3-4, 47-56 (1994).
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Experimenting with the graphic calculator. (English)
Math. Sch. (Leicester) 22, No. 2, 34-35 (1993).
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