Salah satu kemampuan abad 21 yang harus dikuasai siswa adalah kemampuan berpikir kritis. Untuk mengetahui tingkat keberhasilan siswa dalam mengembangkan kemampuan berpikir kritis, diperlukan suatu instrumen yang dapat mengukur kemampuan tersebut. Artikel ini memperkenalkan penggunaaan Rasch Model untuk mengembangkan instrumen pengukuran kemampuan berpikir kritis siswa pada topik kimia, terutama topik ikatan kimia. Berdasarkan analisis Kompetensi Dasar (KD) dan Indikator Berpikir Kritis, indikator soal dirancang. Berdasarkan indikator soal, butir soal beserta kunci jawaban dan pedoman penskoran dikembangkan. Instrumen terdiri dari 13 soal tipe uraian yang divalidasi oleh dua orang pakar dan direvisi berdasarkan masukan yang diberikan. Instrumen diujicobakan kepada 51 siswa SMA di Tanjungpinang. Model Rasch parsial-kredit diterapkan pada data hasil uji coba untuk memeriksa kualitas tiap butir soal dan kualitas instrumen secara keseluruhan. Hasil analisis menunjukkan bahwa 12 dari 13 item soal memenuhi kriteria soal yang baik menurut Rasch Model dengan reliabilitas instrumen 0,72 (cukup). Studi ini menunjukkan bahwa penggunaan Rasch model untuk mengembangkan instrumen pengukuran kemampuan berpikir kritis dalam bidang kimia cukup menjanjikan.

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The aimed of this study was to determine the collaborative skills of students in using project-based learning at SMAN 1 Tanjungpinang. The implementation of the project-based learning model was not optimally used during the learning process. This type of this research was quasi-experiment with pretest postest group design and data collection was carried out by distributing collaborative skills rubrics to 40 students, the sample was selected by purposive sampling technique. The data analysis technique used simple regression. The results showed that the students who have been taught by project-based learning had excellent collaborative skills and achieved good criteria of each indicator of collaboration skills.

A scientific paper containing innovative work in the learning process is needed by teachers as requirement in upgrading their rank in their professional development, including senior high school/equivalent teachers in Bintan Regency. However, generally they get difficulties in making scientific work was caused difficulty in finding relevant reference sources relate to research topic, limited knowledge in information technology and avoid plagiarism check. The purpose of this activity is to guide high school/equivalent teachers in Bintan regency in order to capable to make correct scientific papers good free from plagiarism with the help of Mendeley reference management. Implementation of activities in the form of workshop or training with lecture methods, discussions, question and answer, and projects. The activity was carried out for two days in the form of workshop and two days in the form of independent assignments. This community service activity was considered successful since 80% participants increasing their knowledge of Mendeley's reference management and being able to apply the knowledge in writing free plagiarizm scientific paper.

Sebuah karya tulis ilmiah yang berisi karya inovatif dalam proses pembelajaran sangat diperlukan oleh guru-guru sebagai syarat kenaikan pangkat dalam pengembangan profesi mereka, termasuk guru-guru SMA/sederajat di Kabupaten Bintan. Namun, pada umumnya mereka mengalami kendala dalam membuat karya tulis ilmiah disebabkan kesulitan dalam mencari sumber referensi yang relevan dengan topik penelitian, keterbatasan pengetahuan dalam TIK, dan kesulitan dalam mengolah kalimat agar tidak terdeteksi sebagai kegiatan plagiasi. Tujuan kegiatan ini agar para guru SMA/sederajat di Kabupaten Bintan dapat membuat karya tulis ilmiah yang sesuai kaedah penulisan yang baik dan bebas plagiasi dengan bantuan manajemen referensi Mendeley. Pelaksanaan kegiatan ini dalam bentuk workshop/pelatihan dengan metode ceramah, diskusi, tanya jawab, dan projek. Kegiatan dilakukan selama dua hari dalam bentuk workshop dan dua hari dalam bentuk tugas mandiri. Kegiatan pengabdian kepada masyarakat ini dianggap berhasil karena sebesar 80% peserta mengalami peningkatan pengetahuan tentang manajemen referensi Mendeley dan mampu mengaplikasikannya ke dalam bentuk karya tulis ilmiah yang bebas plagiasiKata Kunci: GMP; Terasi Tutok, Standarisasi; Kuala Pusing Kapal.Development of Mendeley Reference Assisted Scientific Writing Ability Management for High Schools Teachers in BintanAbstractA scientific paper containing innovative work in the learning process is very much needed by teachers as a condition of promotion in their professional development, including high school / equivalent teachers in the Bintan Regency. However, in general, they experience difficulties in making scientific papers due to difficulties in finding reference sources that are relevant to the research topic, limited knowledge in ICT, and difficulty in processing sentences so as not to be detected as plagiarism activities. The purpose of this activity is for high school / equivalent teachers in Bintan Regency to be able to make scientific papers in accordance with good writing methods and to be free of plagiarism with the help of Mendeley's reference management. The implementation of this activity is in the form of workshops/training using lecture, discussion, question and answer, and project methods. The activity was carried out for two days in the form of a workshop and two days in the form of an independent assignment. This community service activity was considered successful because 80% of the participants experienced an increase in knowledge about Mendeley's reference management and were able to apply it in the form of plagiarism-free scientific papers.