The development of teaching materials of the potential coral reefs in Tiga Island Natuna on the concept of ecosystem

Abstract

The purpose of this study is to develop teaching materials about coral reefs Tiga Natuna Island in Biology learning on ecosystem material in high schools. The research method used was descriptive analysis, and the research model used was ADDIE (analysis, design, development, implementation, and evaluation). However, the completion of this teaching material was still in the testing phase. The weak experimental method with the one-group pretest-posttest design was conducted in this testing phase. Sixteen students were selected by purposive sampling in grade X Public High School. Data was collected through instruments written tests. The test was arranged based on the indicator of environmental literacy on the knowledge aspect. Then, data was tested by N-gain. Based on the results of the testing of this teaching material obtained n-gain of 61.78 (medium category). The average pretest-posttest score of students was 50.16 and 85.61.