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A survey and exploratory study were conducted to analyze Lake Tempe as a resource for contextual learning (CTL). The first phase of the study included exploring the lake’s potential through interviews with the people who live in the lake’s coastal region. Quadrat transects were done to identify aquatic plants around the lake. A feasibility analysis was conducted to see the lake’s potential as a learning resource. Field data were collected and compared to the environmental biology (EB) curriculum, responses, and learning outcome. The data were analyzed descriptively and tested using a paired-sample t-test. The results showed differences in the three stations’ physicochemical parameters and decreased quality of the water. It was found that anthropogenic activity had a significant contribution to the lake’s pollution. Nine species of six aquatic plant families were found in the lake. The survey revealed that the lake was feasible as a learning resource with criteria easy to access, safety, time efficiency, costs, and the material's suitability for EB courses. The t-test showed a difference in the students’ scores between before and after exploration practices. These findings suggest that Lake Tempe<em> </em>can serve as a resource for CTL in EB courses.

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9Renewable energy is collected through sustainable natural processes. One of the examples of 10 renewable energy is a biofuel. A biofuel is produced from organic materials, such as plants with 11 high sugar content. Sago starch extracted from sago pith contains starch and fiber that can be 12 converted into glucose by hydrolysis. Sago starch and fiber can be processed into bioethanol as 13 the main ingredient of renewable energy source. In this study, bioethanol production from sago 14 waste fermented by baker's yeast and tapai underwent the following stages: delignification, 15 hydrolysis, fermentation, and distillation. The highest bioethanol content was obtained from the 16 BRT treatment where wet solid sago waste was fermented by baker's yeast (45.7021%), while the 17 lowest was found in the BTP treatment (0.9504%). Two or more than two peaks were shown by 18 the ART, ATP, BTP, and KTP treatments, whereas only one peak was indicated by the BRT and KRT 19

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