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Acid-base is prerequisite material for studying the hydrolysis of salts and buffer solutions. This material is still difficult to understand for students. This study aims to reveal the level of validity and practicality of electronic module based on structured inquiry containing three levels of chemical representation. This research was Research and Development (R&D) using Plomp’s development model. The research instrument was a validaty and practicality questioannair. The e-module was validated by 4 chemistry lectures and 2 chemistry teachers. The practicality test was carried out on 2 chemistry teachers and 65 students grade XI of Senior High School. The data were analyzed using the Kappa Cohen formula. The result of the study showed the developed e-modul had a very high level of validation ( k = 0.86). The results of practicalities also showed a very high level, k=0.90 response of teachers, and k= 0.88 response of students. The e-module was valid and practically for in acid-base learning in Senior High School.

The purpose of this study was to analyze the development of a team-based projectbased blended learning model to increase student creativity in the Creative Economy course. Knowing the validity, practicality and effectiveness of the results of developing a Team Based Project-based Blended Learning model used to increase student creativity in the Creative Economy course. The method used in this study is a research and development (R & D) method. The development used is adapted from the ASSURE model which consists of 6 stages, namely; (1) analysis of student character, (2) determining competence, (3) choosing methods, media and teaching materials, (4) utilization of teaching materials and learning media, involving students in the learning process, (6) evaluation and revision. Product validity was tested by expert test, expert validation sheet instrument. The research instruments were in the form of expert validation sheets of learning materials, expert validation of learning models, and response questionnaires for students. The research subjects are students of the fifth semester of the Economic Education Study Program for the 2022/2023 academic year who are taking creative economics lectures. The validation assessment by the learning material experts obtained a percentage of 96% with a very feasible interpretation, the expert validation of the learning model was 90% proper interpretation. The results of the research are expected to develop a team-based project-based blended learning model in Creative Economy learning to have a positive impact on improving student learning outcomes and creativity.

The purpose of this study is to produce teaching materials based on project based learning in the Research Methodology course. It also aims to determine the effectiveness of teaching methodology courses with a project based learning approach and find out students' responses to teaching materials developed in the form of textbooks and learning videos. The development procedure used in the development of this teaching material is the ADDIE Model Romiszowski. The model consists of five steps, namely: (1) analysis (analize), (2) design, (3) development (development), (4) implementation and (5) evaluation. Based on the results of research and development can be concluded several things as follows: (1) Development of research methodology textbooks based on Project Based Learning using ADDIE models. The analysis phase (Analyze) begins with conducting syllabus analysis, student analysis, concept analysis, task analysis. The design phase are carried out by preparing instruments, choosing the format and initial design of teaching materials, the results of teaching materials are obtained in accordance with the needs of students in the form of textbooks based on Project Based Learning and learning videos. The development phase is done by developing teaching materials into 12 learning activities that are equipped with video learning from each chapter then validated by material experts with a total score of 4.07 while learning media experts with a total score of 4.08 with categories valid and revised according to expert advice.

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