Biopendix, Volume 4, Nomor 1, Oktober 2017, hlm. 68-74 Y. Kailola, F. Leiwakabessy, P.M.J.Tuapattinaya, Implementasi Model … 68 IMPLEMENTASI MODEL PEMBELAJARAN PROBLEM BASED INSTRUCTION BERBASIS LKS UNTUK MENINGKATKAN HASIL BELAJAR SISWA PADA KONSEP SISTEM PERNAPASAN KELAS VIII SMP NEGERI 5 AMBON Yulita Kailola 1 , F. Leiwakabessy 2 , P.M.J. Tuapattinaya 2 1 Alumni Program Studi Pendidikan Biologi 2 Staf Pengajar Program Studi Pendidikan Biologi E-mail: lita_kailola@gmail.com Abstract Background: One reason students tend to score below the KKM is the lack of understanding of the material provided by teachers and students less actively involved in the learning process. Method: This research uses Problem Based Instruction (PBI) model and the Student Sheet (LKS) media. This study looks at the improvement of students' learning outcomes on the concept of the VIII grade system of SMP Negeri 5 Ambon by applying the Problem Based Instruction based LKS model. This research was conducted at SMP Negeri 5 Ambon. Result: Implementation of Problem Based Instruction based learning model (LKS) based on LKS can improve biology learning result. Conclusion: Implementation of Problem Based Instruction based learning model can improve student learning outcomes on the concept of Respiratory System of Class VIII4 SMP Negeri 5 Ambon. Keywords: Problem Based Instruction, Student Work Sheet (LKS), Learning Outcomes, Respiratory System. Abstrak Latar Belakang: Salah satu penyebab siswa cenderung mendapat nilai dibawah KKM adalah kurang memahami materi yang diberikan oleh guru dan siswa kurang terlibat aktif dalam proses pembelajaran. Metode: Penelitian ini menggunakan model pembelajaran Problem Based Instruction (PBI) dan media Lembaran Kerja Siswa (LKS). Penelitian ini melihat peningkatan hasil belajar siswa pada konsep sistem pernapasan kelas VIII SMP Negeri 5 Ambon dengan menerapkan model pembelajaran Problem Based Instruction berbasis LKS. Penelitian ini dilakukan pada SMP Negeri 5 Ambon. Hasil: Penerapan model pembelajaran Problem Based Instruction (Pembelajaran Berdasarkan Masalah) berbasis LKS dapat meningkatkan hasil belajar biologi. Kesimpulan: Penerapan model pembelajaran Problem Based Instruction (Pembelajaran Berdasarkan Masalah) berbasis LKS, dapat meningkatkan hasil belajar siswa pada konsep Sistem Pernapasan kelas VIII 4 SMP Negeri 5 Ambon. Kata kunci: Problem Based Instruction, Lembaran Kerja Siswa (LKS), Hasil Belajar, Sistem Pernapasan.