Ikatan Kimia merupakan salah satu materi kimia dengan konsep yang abstrak, dan diakui sulit dipahami serta sering kali menimbulkan miskonsepsi pada siswa. Penelitian ini bertujuan untuk mengidentifikasi miskonsepsi siswa pada konsep Ikatan Kimia. Metode yang digunakan dalam penelitian adalah deskriptif kuantitatif. Penelitian dilaksanakan pada 31 Januari sampai dengan 6 Februari 2018. Subjek penelitian ini adalah siswa kelas X tahun ajaran 2017/2018 dengan jumlah sampel sebanyak 48 siswa. Identifikasi miskonsepsi dilakukan menggunakan instrumen tes berbentuk four-tier multiple-choice (4TMC). Jawaban siswa dari tes 4TMC tersebut kemudian dianalisis dan dikategorikan berdasarkan tingkatan pemahaman siswa. Hasil menunjukkan bahwa terjadi miskonsepsi sebesar 30,31% (kategori rendah). Miskonsepsi signifikan teridentifikasi pada 8 dari 13 subkonsep Ikatan Kimia yaitu subkonsep Struktur Lewis dan Kaidah Oktet (33,33%), Ikatan Logam dan Sifat Logam (20,83%), Senyawa Ionik dan Senyawa Kovalen (27,08%), Teori VSEPR (20,83%), Teori Domain Elektron (18,75%), Kepolaran Molekul (27,08%), Gaya van der Waals (14,58%), dan Ikatan Hidrogen (29,17%). Hasil identifikasi miskonsepsi siswa ini diharapkan dapat membantu dalam menangani miskonsepsi pada siswa lebih awal agar tidak menghambat siswa dalam pembelajaran. Kata kunci Miskonsepsi, Ikatan Kimia, Four-Tier Multiple-Choice Test
Project-based learning (PjBL) has been conducted in high schools around the provincial capital city. The PjBL students’ worksheet, which was not available in the topic of water filtering materials, had been developed with R&D (ADDIE model). The worksheet was considered valid by validators and feasible to apply in real teaching. Thirty (30) high school students participated and they were divided into six groups. Each group consisting of five students conducted their own projects guided by PjBL worksheet. Students were given problems on how to design and test an effective water filter for muddy water. Their cognitive score tests increased significantly after employing the PjBL class. Students’ skills were generally high as well as their work performance during and after conducting the projects. The majority of students and all teachers responded positively to the PjBL implementation and the model was recommended by teachers to apply to other classes and schools.
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