Development of Green Chemistry-Based Practical Guide Book in Science High School Students Class X Even Semester

Practicum activities in the laboratory are important things to do in learning chemistry. However, in the fact, practicum activities in various schools still have many obstacles such as lack of time, tools and materials that are not yet available according to the needs and implementation of practicums that are not yet environmentally friendly and endanger students so that practicum activities are rarely performed. Therefore, in this study the chemical laboratory handbook was developed using a chemical that is safe, environmentally friendly and based on green chemistry. In addition, this guide also contains how to use tools and materials, laboratory techniques, making of the solutions, and work scheme in the form of drawings that aim to conduct practicums safely and smoothly. This study uses a 4D development model. The targets in this study are the validity, practicality and effectiveness of guidelines for student learning outcomes. Based on the results of data analysis, it appears that the practicum guides developed are very feasible and practical to be applied in chemistry and practicum learning because they get "Very Good" scores. The effectiveness of the guide seen from student learning outcomes. The Gain N Score obtained in this study was 0.61, from this result it can be concluded that the use of the "Quite Effective" guide on improving student learning outcomes.