The purpose of research was to study grade 10 students’ conceptual understanding of chemical reactions and biomolecules. The target group there was 33 grade 10 students classroom 14 in Phadungnaree school of Thailand in the 1st semester of 2016 academic year. The instrument was used in this study was conceptual understanding measurement. Then, the students’ conceptual understanding were analyze and categorize used the critiria of westbrook and marek separate conceptual understanding there are 5 level consists of 1) Complete Understanding 2) Partial Understanding 3) Partial Understanding with Specific Alternative Conception 4) Alternative Conception and 5) No Understanding.Therefore, this research shows the most of students was conceptual understanding about chemical reaction and biomolecules within alternative conception level. The chemical reaction concept consists of Process of chemical reaction, chemical equation, type of chemical reaction, rate of reaction and the factors that affect to rate of reaction. They got the percentage within alternative conception level of each concept were 48.48, 51.51 , 54.55 , 66.67 and 57.58 percent respectively and biomolecules concept consists of the structure and composition of fat and oil, properties of fat and oil, types of carbohydrates, properties of carbohydrates, the structure and composition of protein, properties of protein and type of nucleic acid. They got the percentage within alternative conception level of each concept are 66.67,72.73, 60.61, 66.67, 69.70 , 51.52 and 63.64 percent respectively.
Thidarat Khamphang, Mahasarakham University, Thailand
Sujint Anguravirutt, Mahasarakham University, Thailand
Kanyarat Cojorn, Mahasarakham University, Thailand
Stream: Student Learning, Learner Experiences and Learner Diversity
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