Research works in some disciplines should be invested in applications in order to develop them later. Otherwise, they will consume the time and money as well as the efforts and chances to step forward in this discipline.
Each study in the field of teaching and learning needs to be applied in practice to prove its scientific relevance, such as using the questionnaire in a specific field of education, or testing the models of students and so on. This is also applied clearly in the field of applied science through experiments, tests and laboratory analyzes.