This study aims to develop android-based mathematics learning media on polynomial material that is valid, practical, and effective for use in learning. This type of research is research and development by applying a 4-D development model which has stages consisting of: define, design, develop, and disseminate. The data collection instruments used were an expert validation questionnaire, practicality questionnaire, and pretest-posttest questions. The subjects of this study were students of class XII SMAN Gogol. The results show that the assessments of material experts and media experts obtained valid criteria. In the practical aspect, the learning media are stated to be very practical to use as a support for learning from the assessment of teachers and students. In the pretest-posttest results of students, the increase in learning outcomes is at the "medium" level seen from the n-gain test scores so the "Pintar Polinomial" learning media is declared to be effectively used in learning polynomial material. It can be concluded that the "Pintar Polinomial" learning media is feasible to use in learning because it has met the criteria of validity, practicality, and effectiveness.

The purpose of this study is to describe the metacognitive problem-solving skills of class X SMA Negeri 1 Kediri students at the level of initial controversial reasoning, exploration, and clarification, when solving irrational inequality problems. This research is descriptive research with a qualitative approach. Data collection techniques used controversial problem tests, problem-solving tests, think-aloud methods, and task-based semi-structured interviews. The data analysis technique used was qualitative data analysis with steps of data reduction, data presentation, and conclusion. The validity of the data used triangulation techniques and member checks. The results show that students' metacognitive problem-solving skills at the initial controversial reasoning level can meet the three indicators of metacognitive activity at the stage of understanding problems and determining the problem-solving strategy plan. Students' metacognitive problem-solving skills at the level of exploration can fulfill the three indicators of metacognitive activity at the stage of understanding problems, determining the problem-solving strategy plans, and completing problem-solving strategies. Students' metacognitive problem-solving skills at the level of clarification can meet the three indicators of metacognitive activity at the stage of understanding the problem, determining the problem-solving strategy plan, completing the problem-solving strategy, and looking back.

This study aims to determine the effect of family support on reading interest in class IX MTs Nurul Islam, Kediri. This study uses a quantitative approach. The sample in this study were 57 respondents. The sampling technique uses non-probability sampling in the form of purposive sampling. The research data analysis was carried out using linear regression analysis. Based on the results of research on family support for reading interest in class IX MTs Nurul Islam, Kediri, namely: the level of family support is in the moderate category and the level of students' reading interest is in the moderate category. Based on the results of the regression analysis, a sufficient/moderate (positive) relationship was obtained between family support and reading interest with a coefficient of determination of 20.9%. Thus it can be said that the influence of reading interest is influenced by family support by 20.9%, while the remaining 79.1% is influenced by other factors.