摘要:This work is part of a larger piece of research (FONDECYT 11100402), and its aim is to determine and characterize the beliefs that preschool teachers have about science; the way they are teaching and learning it, and also the influence of these beliefs on the implementation of a government program (Your Competencies in Science, from now on, TCC). This work, under the aforementioned framework and from a mixed methodological approach, is intended to get to know the belief's systems about science, teaching and learning of the preschool teachers participating in Valparaiso Region (n = 61) to lately go deeper into a stratified and representative sample of the teachers (n= 9) that are working on the implementation of the TCC program. It is expected that the results are an incentive and a reference for more work at this level to be conducted and that they would help to understand how preschool teachers act regarding science.