In this article, the relationships between students’ personal relationship to the concept of pressure and teaching conditions of this concept were investigated in terms of the Anthropological Theory of Didactics. To determine these complex relationships, first an institutional analysis was conducted, and in this same manner, the textbook has been analyzed to uncover the institutional eelationship to the concept of pressure, and second, an achievement test has been used to gather data to uncover personal relationship to concept of pressure. 348 8th-grade students who successfully completed the pressure topic in their science classes participated in this study. The gathered data were analyzed in a descriptive and qualitative way. The results of this study emphasize the relationship between the teaching conditions and the students’ understanding of pressure and support the need for multiple representations to teach effectively the pressure concept.

The aim of this study was to reveal secondary school students' ability of making transitions between text, picture, table and graphic representations related to the electricity. The research is a case study of the qualitative research methods. The working groups of the study were totally 100 students, including 50 from each of 6th, 7th and 8th students, studying at a secondary school in the 2012-2013 academic year. To determine the students' status of transitions in representations, a measurement tool relating to the subject of electricity was developed by researches. The measurement consists open-ended questions which questioned transitions representations (text, images, tables and graphics) with each other. Document analysis method was used in data analysis. In this context, determining specific criteria, established codes in accordance with the given answers by the students and the questions was evaluated in certain dimensions. Consequently, students were found to be inadequate to present transitions in representations in electricity. When the results are evaluated, it was suggested that during the teaching of electricity topic, teaching practices to draw attention to transition between different representations and in measurement-assessment processes, the questions reflecting the transition between different representations should be given; regulation the assessment questions in textbooks in this direction is recommended.

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