Abstract:
This research was posttest two-group quasi-experimental design, aimed to (1) analyze students conceptual understanding in biology after learning through context-based learning approach, and (2) compare students conceptual understanding in biology between group learning through context-based learning approach and group that learning through conventional method. The research population was upper secondary school students of large schools in Bangkok. The samples were 84 eleventh grade students. Thirty-nine students in one classroom were randomly assigned to the experimental group and given lessons based on context-based learning approach. Fourty-five students in another classroom were randomely chosen to the compared group and given lessons based on conventional teaching method. Research duration was in the second semester of the academic year 2016. The research instruments were conceptual understanding tests. The collected data was analyzed by means of arithmetic mean, mean of percentage, standard deviation, and t-test. The research findings were summarized as follows: 1) The experimental groups percentage mean scores of students' conceptual understanding in biology was rated at pass level. 2) Students in both experimental and control groups mean scores of students' conceptual understanding in biology showed no significant difference.