DEVELOPMENT OF LABORATORY WORKSHEET BASED ON PROBLEM BASED LEARNING TO IMPROVE STUDENT LEARNING OUTCOMES

A factor that cause the students outcomes of grade XI low is using only one school chemistry book. This research has aim to develope Problem Based Learning Laboratory Worksheet toward student results on buffer solution. The subjects of this study were students grade XI senior high school. The method of this research is research and development (R&D), 3D that are define, design and develop. Data in this research were obtained using the method of observation, interview, questionnaires, and test. The data are feasibility of problem based learning laboratory worksheet, the students learning outcomes, and responses from students also teacher. Data analysis using quantitative descriptive method. Quantitavely, the data were analyzed by calculating the mean score and determine the criteria at intervals of a certain class. Based on the result of the research of analyzing the feasibility of laboratory worksheet is very well criteria with presentation is 91,9%. Laboratory worksheet included in the category of effective because classical completeness is 100% and N-gain is 0,78 (high). Worksheet get a good response from user. So, it can be concluded that laboratory worksheet based on problem based learning is feasible, get positive response from user and can improve student learning outcomes, so it can be used in chemistry learning process.