This study aims to determine the cognitive structures of students at different educational levels (8th grade and 12th grade) related to acid-base chemistry. The research was designed as a case study and structured in two stages. The first stage analyzed concepts related to acid-base chemistry and their direction and strength in students' knowledge…

The topic of physical and chemical changes is one of the basic and essential issues of both the lowersecondary school science curriculum and the upper-secondary school chemistry curriculum in many countries. The focus of the present study is to investigate the students' cognitive structures on the topic of physical and chemical changes at…

Understanding students' cognitive structures in a specific knowledge domain helps to determine the ''what, how and why'' features of such knowledge, so that we can take these structures into consideration in teaching. The purpose of the present study was to identify students' cognitive structures about solution and dissolution concepts. The study…

Determining students' knowledge structure is important for assessing what a learner knows about a domain of knowledge. Traditional assessment methods are not always appropriate for exploring students' knowledge structure and changes during the learning period. This study investigates how the existing knowledge structure of the learners interacts…