The present investigation takes place in a qualitative project sponsored by the Chilean Education Ministry, in order to develop an observation instrument in P. E classes mainly in primary public schools. The previously mentioned project enables dialogue processes to improve professionals' didactic work in this area. The qualitative project was developed in complementary stages: specific literature review, perceptions of senior PE students and perceptions of PE teachers who are working at public schools. In relation to the sources, three didactic processes were established: management, action and didactic knowledge. As a result, it was possible to define the indicators for each dimension, as well as investigate implementation indicators from the specific instrument. This report deals mainly with the results and process associated to the naturalist stage.