The investigation realizes an analysis of the educational work in the classroom, in relation to the capacity of didactic transposition of the teacher and the academic performance of the pupils on having finished the academic semester. For the study in reference 145 students of the School took part Academic Professional of Education, semester 2011-I, of our Faculty of Education. The work was orientated to find if there is relation between the variables above mentioned; before he identified by means of the instrument of compilation of information if the process of didactic transposition was developing during the meetings that the teacher was giving. In the initial results obtained by means of the statistician of test ETA can establish that relation does not exist between both variables in discussion. Nevertheless the general results induce us to think that if there might be a direct relati...