Abstract:

During the practical training at lower secondary school, authors, one of which is the student of teacher training programme, prepared a small experiment for pupils of the sixth and eighth grade of primary school, i. e. for 11 – 12 and 13 – 14 years old children.
It comprised of four tasks related to representation of solids in the plane and the spatial imagination. In the first two problems, pupils were expected to finish an image of a cube in cabinet projection with angle of 45° and a ratio ½. In the second two tasks, children worked with the image of building made from two rectangular boxes in the same projection and its views.

In the paper, there are analyzed the results of children’s efforts. They are divided to several groups according to the degree of success in the solutions. The evaluation brought the surprising fact regarding the front view of the building. The sample of 40 sixth grade and 20 eighth grade pupils enabled a statistical description and comparison, which is also included.

Keywords:

Representing solids, tasks, lower secondary school, cabinet projection, cube, rectangular box.