International study of seventh grade students' understandings of scientific inquiry : the cases of Israel and South Africa - Mamlok-Naaman, Rachel (Weizmann Institute of Science (Israel). Department of Science Teaching) ; Gaigher, Estelle (University of Pretoria (South Africa). Department of Science, Mathematics and Technology Education) ; Hattingh, Anne-marie (University of Cape Town (South Africa)) ; Kay, Gillian (University of Cape Town (South Africa)) ; Blonder, Ron (Weizmann Institute of Science (Israel). Department of Science Teaching)