With the reconstruction of the curricula in Turkey, important changes have existed in the activities of education and teaching. That is why it has become an important case of research to determine how much student teachers know about the process of learning-teaching. This study aims to show how are student teachers capable are of planning and applying the process of learning-teaching effectively. Thus, eighteen senior student teachers from the Department of the Primary School Mathematics Teaching at the Education Faculty of a university in Turkey were interviewed in a semi-constructed way. At the end of the study, it was determined that the student teachers knew the activities in the new primary school mathematics curricula, most of them found themselves competent enough to prepare materials and apply them, but they were not competent enough to use mathematics software although they knew them and they were insufficient in the approaches which the new primary school curricula are based on. In light of the results acquired from the study, it is suggested that the student teachers should be taught to use worksheets at the different stages of the lessons through exercises and also they should be informed of how to use the computer programs and the approaches on which the new primary school curricula are based in the environment of learning-teaching.