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The low problem-solving ability of students was due to the lack of student learning activities, so that learning activities were needed that can motivate students to learn and develop problem-solving skills. This study aimed to analyze the effectiveness of learning activities based on Revised Bloom's Taxonomy on problem-solving abilities. The type of research used was development research with a 4D model. The subjects of this study were four experts and 55 fourth-grade elementary school students. The object of this research was the effectiveness of Revised Bloom's Taxonomy-oriented learning activities. The data collection method used was the non-test method and the test method. The instruments used were questionnaires and description tests. The data analysis technique used was descriptive quantitative statistical data analysis techniques in the form of prerequisite tests and t-tests. The results of this study indicate that the average score of the experimental class was 83.50, while the control class was 74.83, and the t-test results obtained a significance value of 0.969 with an at-count of 0.00 < t-table of 0.05. This research concluded that learning activities based on Revised Bloom's Taxonomy effectively improve students' problem-solving abilities. The implication of this development research was to produce products in the form of learning activities based on Revised Bloom's Taxonomy that can train curiosity, self-confidence and improve students' problem-solving abilities.

Lack of teacher creativity in learning to develop instructional media makes learning less effective. Therefore, it is necessary to develop media that can make students enthusiastic about learning, such as digital comics. This research produces a product in the form of Digital Comic media on elementary school student style whose validity has been tested. The model used is the ADDIE model with the stages of Analyze, Design, Development, Implementation, Evaluation. In this study, digital comic media used as research subjects were 2 media expert lecturers, 2 material experts, 2 teachers. The method and instrument of data collection in this study is to use the rating scale method. To measure the validity of digital comic media using an instrument to assess the validity of digital comic media. The results of the data that have been obtained will be analyzed using the Aiken validity index formula for expert data and the mean formula for respondents' data in order to determine the validity of digital comic media. The results of the media validity on the Aiken validity index analysis, the assessment of the experts, got a score of 0.95 from the material experts with the criteria of "high validity", 0.95 from the media experts with the criteria of "high validity", while the analysis of the assessment scores of the respondents used the formula. The mean obtained an average of 4.57 from the practical response with the predicate "very good" and 4.50 from the student response with "very good". So, digital comic media is very suitable for use during the learning process, especially science learning.

Lack of availability of learning media on ecosystem topics which results in the learning process being less effective. This study aims to describe the prototype of the development of educational monopoly learning media and to produce educational monopoly learning media whose validity has been tested. This type of research is a development research using the ADDIE model which consists of five stages, namely analyze, design, development, implementation, and evaluation. The trial subjects in this study consisted of 2 material experts, 2 media and design experts, 2 practitioners, 3 students for individual trials and 6 students for small group trials. This research data collection method using a questionnaire method with the distribution of a 4 scale rating scale instrument. The data obtained from the assessment results were analyzed using the Mean formula to obtain an average score. The average score of material experts, media experts, design experts, practitioners, individual trials, and small group trials respectively was 3,79, 3,86, 3,78, 3,70, 3,80 with very good qualifications. So that the overall validity of the educational monopoly learning media is in the range of 3.25