Students mathematical representation of Hatyaiwittayalaisomboonkulkanya School Thailand based on SOLO Taxonomy in solving PISA problem

This research aims to describe mathematical representation ability of Hatyaiwittayalaisomboonkulkanya School students based on SOLO taxonomy in solving PISA problem especially change and relationship content. Data were analyzed through descriptive method with qualitative approach. Data were collected through a test using PISA problem and semi-structural interview. Test was given to Mattayom 4 students with 15-year-old average age. The result of this study showed that students with multi-structural and relational level tend to use verbal representation and students with extended abstract level tend to use verbal, visual, and mathematical expression representation in solving PISA problem on change and relationship content. Verbal representation are generally showed by writing argument, possibilities, and reasons of the final answer. Visual representation are generally showed by making diagram and table. Mathematical expression representation are generally showed by writing the reasons of final answer by using addition expression.