Mathematics is the basis for other sciences and students in schools from elementary school to college must learn and master it. But in reality, many students get the results of daily math tests under the minimum achievement criteria, especially on the derivative material of algebraic functions. This study has the aim of producing and developing appropriate learning media products which will then be tested for validity and practicality based on expert validation and student response questionnaires. This research is a research and development on 30 students of class XII PH 2 SMK Negeri 1 Lamongan. This research method uses the ADDIE model. results obtained in this study are as follows: 1) The results of the validity of the media obtained from the validation of media and learning materials, get an average rating of 87.5% in the "Very Valid" category, 2) The results of the student response questionnaire to determine the practicality of the media show a rating of 90.5% in the "Very Practical" category.
Mathematical connection ability is one of the basic mathematics skills that must be possessed by junior high school students. It turns out that so far, the student's learning outcomes in terms of mathematics have not been encouraging. This study aims to describe the mathematical connection skills of junior high school students in solving a problem in terms of learning independence. This research is a qualitative descriptive study on eighth-grade students in a junior high school in Lamongan district, East Java. Data was collectied using test questions, interviews, and questionnaires. This study obtained the following results: 1) one subject (S2) who has high mathematical connection ability with low learning independence, 2) one subject (S1) who has moderate mathematical connection ability with moderately high learning independence, and 3) two subjects (S3 & S4) who have low mathematical connection skills with low learning independence. The internal causes of the lack of mathematical connection skills and student learning independence are the lack of practice questions, the lack of motivational stimulus to encourage students to study independently. While external factors are the level of test questions that are tested too difficult and the lack of supporting learning information sources
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