This research is motivated by the aim to be a reference in the manufacturing room management information system in UKI. Analysis and Management System Design Lecture Hall (Room Management) is one of room management system that serves to regulate the use of the room automatically so that the room can be used more optimally. it will also save the costs. Therefore, room for the Manage applications are made so that it can implement Information technology service management in which it can help efective handling arrangements room usage and efficient in Christian University of Indonesian to support the development of the institution. While the benefit to be achieved in the making of this thesis is that if the design of this system has been implemented, it will save money, because the room is used optimally.Keywords : System, Classroom.

PkM bertujuan untuk pemodelan matematika. Saat online banyak yang tidak sesuai antara perencanaan dan pelaksanaan. Surve kementerian pendidikan dan lembanga UNICEF 2020 diperoleh 58% kurang efektif saat online. Surve juga dilakukan di SMA dan mendapati, 38% kurang motivasi, 35% alat komunikasi buruk, dan 62% membutuhkan internet gratis, 92% kesulitan konsep matematika secara online. Metode pelaksanaan PkM berbentuk studi kasus, dengan mengembangkan materi matematik. PkM dilaksanakan siswa IPA 1, 2 dan 3 kelas XI SMA Yadikan 11 Jatirangga Bekasi, tanggal 25-28 Mei 2021. Hasil PkM: 1) Bentuk materi yang dapat diiplementasikan secara daring 2) Strategi mengajar dalam pelaksanaan pembelajaran secara daring, dengan respon sangat baik yaitu 90.50%, 3) Bentuk penilaian hasil belajar peserta didik menunjukan 87% sangat baik, 10% baik dan 3% cukup baik. Ada peningkatan peserta didik pasca PkM dilakukan, hal ini terlihat dari hasil belajar dan surve kepuasan peserta didik 89% menyatakan puas. Tindak lanjud dari PkM adalah memonitoring hasil belajar peserta didik dan mengadakan monev dengan guru matematika, membahas masalah, kesulitan peserta dan solusi yang harus dilakukan. Kesimpulan dari hasil PkM adalah adanya peningkatan minat peserta untuk belajar matematika berbantuan materi yang disusun pelaksana PkM. Materi yang disusun meningkatkan hasil belajar peserta didik dalam mengatasi kesulitan.

This study aims to develop Problem Based Learning (PBL)-based worksheets to improve student’s critical thinking skills in contextual problem solving. The research design used is a feasibility analysis by research and development methods. The research was carried out using research and development (R&D) research and development methods. The sample consisted of 40 students from science programs in 11th grade. The data collection instrument used is the expert assessment sheet, student responses to the created worksheet. The development procedure with 8 stages namely potentials and problems, information gathering, product design, expert validation, first revision, product trial, second revision, final product. From the results obtained the average feasibility value by the media is 81.46% (very feasible), the average graphic feasibility value is 81.85% included in the very feasible criteria, the language eligibility average value is 76% included in the appropriate criteria and the average value of student responses is (87.40%) (very positive).

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