Vol. 10 Num. 1 (1990) Kathryn Crawford Language and technology in classroom settings for students from non-technological cultures2 Marta Civil You only do math in math: a look at four prospective teachers' views about mathematics7 Ronnie Brown , Tim Porter Mathematics in context: a new course10 David Fielker Observation lessons16 Efraim Fischbein , Dina Tirosh , Ruth Stavy , Anat Oster The autonomy of mental models23 Paulus Gerdes On mathematical elements in the Tchokwesona tradition31 Jan van den Brink Classroom research35 Marcelo C. Borba Ethnomathematics and education39