Penelitian ini bertujuan untuk mengetahui (1) kelayakan multimedia berbasis komputer ditinjau dari kriteria validitas isi, penyajian, dan kebahasaan, (2) pergeseran pemahaman konsep siswa. Penelitian ini menggunakan pengembangan desain 4-D (define, design, develop, disseminate), penelitian ini terbatas sampai tahap develop. Penelitian ini menggunakan rancangan penelitian One group pretest-posttest design dengan sampel penelitian yaitu 15 siswa kelas XI MIA-1 SMA 17 Agustus 1945 Surabaya. Hasil penelitian menunjukkan bahwa (1) kelayakan multimedia berbasis komputer pada materi kesetimbangan kimia berdasarkan penilaian dosen kimia mendapatkan hasil validitas rata-rata sebesar 77,41% dengan kategori layak, dengan rincian berdasarkan kriteria kelayakan validitas isi sebesar 75,55% dengan kategori layak, validitas penyajian sebesar 76,67% dengan kategori layak, dan validitas kebahasaan sebesar 80% dengan kategori layak. (2) terjadi pergerseran pemahaman konsep siswa yaitu terjadi peningkatan persentase siswa tahu konsep sebesar 26%; penurunan persentase siswa tidak tahu konsep sebesar 10,67%; dan penurunan siswa yang miskonsepsi sebesar 15,33%.Kata Kunci: Desain Pengembangan 4-D, Pemahaman Konsep, Miskonsepsi The aims of this development research are to know about (1) the feasibility of computer based multimedia by the criteria content feasibiliy, presentation, and linguistic, (2) a shift in understanding concept of students. This research of development used design 4-D (define, design, develop, disseminate), that is limited until develop stage. the research used the One group pretest-posttest design with sample is 15 student XI Science-1 SMA 17August 1945 Surabaya. The result show (1) the feasibility of computer based multimedia in chemical equilibrium topic by a assessment chemistry lecture get result of feasibility rate were 77,41% with feasible category, with detail by the criteria content feasibiliy were 75,55% with feasible category, the criteria presentation feasibility were 76,67% with feasible category and the criteria linguistic feasibility were 80% with feasible category, (2) a shift in understanding concept of students is occur increase percentage know concept of students were 26%; decrease percentage not know concept of students were 10,67%; and decrease percentage misconception of students were 15,33%.Key Words: Development 4-D design, Understanding concept of student, Misconception.
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