Learning materials based on local wisdom are needed to make it easier for students to understand the material because it is close to the student environment. The study aims to measure the effectiveness of teaching materials based on local wisdom of agriculture in Binjai in improving the students' environmental literacy. The type of research was a quasi-experimental which use a nonequivalent control group in the pretest-posttest design. The sample of study were students of Senior High School grade X consisted of 36 students in the experiment group which used teaching materials based on local wisdom of agriculture in Binjai and 36 students in the control group used student handbooks. Material experts and technology experts to ensure the quality of teaching materials test teaching materials. Data collection was conducted through a test. The results showed that the teaching materials based on local wisdom of agriculture in Binjai effective in improving environmental literacy in the experimental group students based on the results of N gain value were 0.72 which has high criteria. It means teaching materials based on agricultural local wisdom of agriculture in Binjai can be used as one of the teaching materials in learning activities.

Article historyImproving students' problem-solving skills can be done through teaching materials. Teaching materials used in schools throughout Indonesia have not been integrated with local potential or wisdom. This research aims to develop teaching materials based on local wisdom to improve students' problem-solving abilities. The local wisdom raised in the teaching materials is the local wisdom of agriculture in Binjai Medan and the Balinese environment based on the local wisdom of the Tumpek Wariga ceremony. The development of teaching materials uses the ADDIE design model (Analyze, Design, Develop, Implement, Evaluate). The implementation phase uses a quasi-experimental method with a non-equivalent control group design in a high school located where the local wisdom applies. The results showed that the feasibility test of teaching materials and the readability test showed that teaching materials based on local agricultural wisdom in Binjai were 83.643% (very feasible) and 77.13% (high). In contrast, environmental teaching materials in Bali were based on local wisdom Tumpek Wariga. Successively very feasible (88.10%) high (95.39%). Students' problem-solving ability has increased with an N-gain of 0.67 (medium) on teaching materials based on local agricultural wisdom in Binjai and 0.71 (high) in Balinese environmental teaching materials based on Tumpek Wariga. The study results showed that teaching materials based on local wisdom of Agriculture in Binjai and Tumpek Wariga in Bali were valid and could improve students' problem-solving skills on Ecosystem and Environmental Change materials.This is an open access article under the CC-BY-SA license.

The aim of the study was to measure the effectiveness of learning materials based on local wisdom of agriculture in Binjai in improving the students' problem-solving abilities. The research method was a quasi-experimental. The sample of study were students that consisted of experiment group which used learning materials based on local wisdom of agriculture in Binjai and control group that used student handbooks. Learning materials were tested by material experts and technology experts to ensure the quality of learning materials. The results showed that the learning materials based on local wisdom of agriculture in Binjai effective in improving students' problem-solving abilities in the experimental group students based on the results of N gain value were 0.67 which has medium criteria. It means learning materials based on agricultural local wisdom of agriculture in Binjai can be used as one of the learning materials in learning activities.