  We show a new semi-quantitative technique of analysis about of temporal
evolution of learning of basic physics concepts. In this technique we arrange a
geometric diagram with the score and the homogeneity (H-S), in this diagram we
have a quantitative and qualitative information about the learning of students
and the effectiveness instruction. We applied this technique to study the
temporal evolution of the graphical interpretation of motion in one dimension
through tutorials in a introductory course physics with 20 students of
engineering at the Universidad Central de Bogot\'a Colombia for a period of 6
weeks. We found in the general diagram that (Smax,Hmax)=(0.75,0.75).
