Raymond Bourdoncle
Middle term evaluation off projective operation learning among students from vocational high schools. - A training scheme focusing on projective operation skills is provided to 4th year students preparing for entrance to vocational high schools and experiencing difficulties to learn technical drawing. This educational process refers to the piagetian scheme in its conception. The author analyses the results of this type of learning for a group of students, compared to a control group. The students from the experimental group reach the level of formal operations whereas some students from the control group still meet with difficulties to realize operations at a concrete level.