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Online learning is one of the solutions needed by educators and students in the COVID pandemic 19 periods that occurred in February 2020. The purpose of this study was to determine the effectiveness of online learning using the zoom cloud meeting application as an alternative to solving the problem of student learning activities at Nurul Jadid University in COVID-19 pandemic period. This research method uses descriptive qualitative research methods using survey techniques. The instruments used were observation, questionnaires, and interview online. Based on the results of the questionnaire the effectiveness of online learning using the zoom cloud meeting application reached 93.75% followed by the results of interviews and observations that can increase student motivation and learning interest.

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This study aims to describe Sufistic-based Kiai leadership's role in shaping Santri character at the Pesantren Nurul Jadid Paiton Probolinggo. This research is a case study qualitative approach, with Kiai as the subject. We collected data using interview, documentation, and observation techniques, then analyzed using reduction techniques, presenting data, and drawing conclusions. The results showed that the Sufistic-based Kiai's leadership had an essential role in fostering the character of the Santri. The study results indicate that the Sufistic-based Kiai leadership has a vital role in promoting the surface of the Santri. Kiai is a person who gives influence in building character with Uswah (Modelling). This study also found that the factors that influence low morale are that Santri has a common understanding of the latest technological developments. In Sufistic-based leadership, there are four things that a leader must possess: 1) The Tawasuth, 2) The nature of I'tidal, 3) The Tawazun, and 4) The Tasamuh.

This study aims to implement android-based learning media in mathematics basic concepts courses on student achievement, and the effectiveness of android-based learning media in mathematics basic concepts courses on student achievement at PGMI Nurul Jadid University. This research uses a quantitative research approach. The data collection is done through documentation and tests. The determination of the sample of this research was carried out by random sampling technique which included the fourth-semester PGMI Study Program students. While the data analysis in this study uses paired sample t-test analysis techniques. Based on the results of data analysis, it can be concluded that t-count = -18,378 with significance = 0,000 < 0.01. Thus, it can be stated that H1 is accepted and H0 is rejected, so it can be concluded that the android-based learning media on the subject of mathematics basic concepts are convincingly effective in improving student achievement.