Science plays a crucial role in human life as it helps us understand the universe through observation, experimentation, and analysis. In education, science not only teaches scientific concepts but also fosters scientific attitudes and critical thinking skills in students. To make science education more meaningful, interactive, and relevant, a deep understanding of the Nature of Science (NOS) is essential. This study aims to explore the understanding, benefits, and application of scientific concepts in the teaching and learning process to shape students' scientific attitudes. Using a literature review method, this research gathers information from various relevant academic sources. The findings indicate that science encompasses elements of philosophy, sociology, history, and psychology that support scientific understanding. By understanding NOS, students will view science as a process of knowledge discovery, rather than merely a collection of facts. The application of science in education also impacts students' ability to apply knowledge in practical contexts, enhance their analytical skills, and adapt to societal changes.

This study aims to determine the effect of service performance and customer satisfaction on customer loyalty at Bank BRI Kangean Unit. Sources in collecting data in this study through secondary data sources through literature studies from literature books, journals, the internet and articles that support the research. The data collection technique is through a questionnaire (questionnaire) to 38 respondents. The data processing test technique was carried out with validity and reliability tests, t tests and f test.
The results of the study show that service performance has a positive and significant effect on customer loyalty, customer satisfaction has no significant effect on customer loyalty. Service performance and customer satisfaction together have no effect on customer loyalty. So in other words H1 is accepted, H2 is rejected and H3 is rejected. Quality Service performance at the Bank Bri Unit Kangean office is quite high but customer satisfaction is still low. 
Keywords: Service Performance, Customer Satisfaction, Customer Loyalty.