<![CDATA[Penelitian ini bertujuan untuk menghasilkan LKPD berbasis filsafat yang valid, praktis, dan memiliki efek potensial pada kemampuan pemahaman konsep siswa pada materi operasi bentuk aljabar. Subjek penelitian ini adalah siswa kelas VII.1 SMP Negeri 1 Tanjung Lubuk. Jenis penelitian ini adalah penelitian pengembangan dengan dua tahapan yaitu preliminary (tahap persiapan, analisis dan desain) dan formative evaluation (self evaluation, expert review, one to one, small group, dan field tes). Teknik pengumpulan data yang dilakukan yaitu walkthrough, angket, tes, dan wawancara. Hasil lembar validasi diperoleh persentase rata-rata sebesar 84% dengan kriteria cukup valid atau dapat digunakan dengan revisi berdasarkan saran, koemntar, dan kesulitan yang siswa alami pada tahap expert review dan one to one. Dan hasil penilaian angket yang dilakukan diperoleh persentase dengan rata-rata sebesar 82,92% dengan kriteria praktis dan telah direvisi berdasarkan saran dan komentar pada tahap small group. LKPD juga memiliki efek potensial terhadap kemampuan pemahaman konsep siswa dilihat dari hasil tes siswa terdapat 18 siswa telah mencapai nilai ketuntasan minimal dengan persentase 56,25%, serta kemampuan pemahaman konsep siswa pada materi operasi bentuk aljabar termasuk kategori cukup dengan rata-rata 66,6. Hal ini menunjukkan bahwa LKPD berbasis filsafat dapat membantu siswa dalam memahami konsep pada materi operasi bentuk aljabar.This study aims to produce a philosophy based worksheet that is valid, practical, and has a potential effect on students' conceptual understanding abilities of algebraic form operations. The subjects of this study were students of class VII.1 SMP Negeri 1 Tanjung Lubuk. This type of research is development research which two stages, namely preliminary (preparation, analysis and design) and formative evaluation (self evaluation, expert review, one to one, small group, and field test). Data collection techniques were walkthrough, questionnaire, test, and interview. The validation results obtained an average percentage of 84% with valid criteria or can be used with revisions based on suggestions, comments, and difficulties the student experienced at expert review and one to one. And the results of the assessment carried out obtained an average of 82.92% with practical criteria and have been revised based on suggestions and at the small group stage. LKPD also has the potential for students' conceptual understanding abilities, seen from the results of student tests, there are 18 students had achieved a minimum completeness score with a proportion of 56.25%, as well as students' conceptual understanding skills on algebraic form operations including the category enough with an average of 66.6. This shows that philosophy based worksheets can assist students understanding the concept of algebraic forms operations.]]>
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