A construtivistic view of teaching and learning in the fields of didactic shows the problem on teacher formation, pointing out the scientific knowledge and the professional competence importance. This work intends to discuss the mutual interference between scientific knowledge and didactic ability in elaborating and executing a pedagogical plan for the classes. Considerations are based upon reflections about teaching situations, planned and conducted by ourselves, including teachers updating and formation of multipliers for this process, among others. Then, some concrete actions, organized for dealing with teacher scientific competence and didactic ability, are related; furthermore practical consequences for teacher regular formation and in service updating are showed
Teacher formation; Pedagogical plan; Scientific content and didactic ability