PENDIPA Journal of Science Education, 2021: 5(3), 403-411 ISSN 2086-9363 https://ejournal.unib.ac.id/index.php/pendipa 403 Penerapan Self-Directed Learning (SDL) dalam Pembelajaran Fisika SMA Berbasis Daring Pada Pokok Bahasan Hukum Newton Silvia Ayu Permatasari * , Mita Anggaryani Jurusan Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Negeri Surabaya *Email: silvia.17030184096@mhs.unesa.ac.id DOI: https://doi.org/10.33369/pendipa.5.3.403-411 ABSTRACT Currently, all Indonesian regions are experiencing a severe pandemic condition that affected all fields, including the education sector. The education system that is usually face-to-face has to turn online, which forces students with teaching staff to carry out the learning process from home. With online-based learning, teachers and students can take advantage of online learning-based platforms, like Google Classroom, to implement Self-Directed Learning (SDL), where there are adjustments to learning devices and material to be taught online and achieve the competencies to be trained. By using the pre- experimental design method, the type of research used was one group pretest-posttest design. This article aims to apply Self-Directed Learning (SDL) in online-based high school physics learning on the subject of Newton's Law. The data analysis technique used is implementation of the learning process, normality test, paired t-test, and n-gain analysis. The application of Self-Directed Learning (SDL) is declared effective if the value on the final test (posttest) has a high value compared to the value of the initial test (pretest), as well as an increase in the results of the application of Self-Directed Learning (SDL) which is shown from the n-test. gain in the high category. In conclusion, the results of the application of Self- Directed Learning (SDL) can be done practically and are categorized as very good. The application of SDL is able to improve students' cognitive abilities in online-based physics learning for Newton's Law material. Keywords: Self-Diected Learning (SDL); Physics Learning Based Online; Newton Law. ABSTRAK Saat ini seluruh wilayah Indonesia sedang mengalami kondisi pandemi yang melanda segala bidang, termasuk bidang pendidikan. Sistem pendidikan yang biasanya tatap muka harus online, yang memaksa siswa dengan staf pengajar untuk melaksanakan proses pembelajaran dari rumah. Dengan pembelajaran berbasis online, guru dan siswa dapat memanfaatkan platform berbasis pembelajaran online, seperti Google Classroom, untuk menerapkan Self-Directed Learning (SDL), dimana terdapat penyesuaian bentuk penelitian memakai metode Pra-eksperimen, dengan desain penelitian one group pretest-posttest design. Artikel ini bertujuan untuk mengaplikasikan Self-Directed Learning (SDL) dalam pembelajaran fisika SMA berbasis online pada mata pelajaran Hukum Newton. Dalam melakukan analisis data menggunakan teknik analisis keterlaksanaan proses pembelajaran, uji normalitas, uji paired sample t-test, uji n-gain. Penerapan Self-Directed Learning (SDL) dinyatakan efektif jika nilai pada tes akhir (posttest) memiliki nilai yang tinggi dibandingkan dengan nilai tes awal (pretest), serta terjadinya peningkatan dari hasil penerapan Self-Directed Learning (SDL) yang ditunjukan dari uji n-gain dengan kategori tinggi. Sehingga dari penelitian ini dapat disimpulkan yaitu hasil penerapan Self-Directed Learning (SDL) dapat dilakukan secara praktis dan dikategorikan sangat baik. Penerapan SDL mampu meningkatkan kemampuan kognitif siwa dalam pembelajaran fisika berbasis online untuk materi Hukum Newton. Kata kunci: Self-Directed Learning (SDL); Pembelajaran Fisika berbasis daring; Hukum Newton.