The aim of this paper is to compare the subject-specific concepts and their use in two chapters dealing with the subject force in two different physics textbooks for grades 4-6. To achieve the aim, the following questions have been formulated:
To achieve the purpose and the issues raised in the paper, the chapter will be analysed with two different content analysis. The material will then be analysed based on Vygotsky's theory of the development of scientific concepts.
The results show that both chapters have about as many subject-specific concepts in comparison to the rest of the words in the chapters. One of the chapters show greater variety of representations with different contexts than the second chapter. Both chapters have used everyday contexts when the subject-specific concepts were explained, but one of the chapters show that different contexts were used depending on the subject-specific concepts.