The low character of students plus the absence of learning resources that support learning about basic volleyball technical skills in the Covid-19 pandemic situation makes it difficult for lecturers to teach. The purpose of this research and development was to produce a character-based volleyball e-module for students using Adobe CS 6 with valid, practical, and effective criteria. This research is a development research. This research used the ADDIE model which consists of 5 stages, namely, needs analysis (analysis), design (design), develop (develop), implement (implement), evaluate (evaluate). The research data was using quantitative data that the data were taken from the results of the evaluation by the validator and the practical data was taken from the responses of lecturers and students to the e-module. The research instruments were validation questionnaires, practicality questionnaires, student character effectiveness sheets, volleyball skills assessment effectiveness sheets. The results of the e-module research on character-based volleyball learning for students using Adobe Flash CS-6 have met the criteria of being valid, practical and effective. From these results, the e-module volleyball learning based on character education for students using adobe flash CS 6 is effective for learning, especially in volleyball lectures, namely the basic technique of volleyball.

The purpose of this research was to develop a practical tool to measure the density of liquids. This research was a research and development research that referred to the development model of Borg and Gall. The research instrument used was a questionnaire with a 4-Likert scale. Evaluation phase included the assessment of media validator, students’ responses, and laboratory test. The product quality data obtained were analyzed using descriptive analysis. The quality of the product based on the analysis of the media expert’s assessment obtained a value of 3.30 which was in very good category. Meanwhile, the results of student responses in the limited-testing obtained a value of 3.30 which showed that they strongly agree with the product’s usability. The test results and questionnaire analysis indicated that the microcontroller-based density determination practicum tool developed was feasible to use. From the experimental results, the density value of water was 0.95 gr/cm3 with a standard deviation of ±0.044 and a relative uncertainty value of 0.22%. The density value for salt water was 1.04 gr/cm3 with a standard deviation of ±0.011, compared with the literature which is 1.10 gr/cm3. Moreover, the density of coconut oil measured was 0.76 gr/cm3 with a standard deviation of ±0.045, while the literature is 0.84.