<![CDATA[Acid-base material discusses the theory, strength, degree of acidity, indicators and titration of acid-base. To help students understand the material, interesting independent learning resources are needed. One of the platforms that can be used is Instagram because it is able to present more interesting material in the form of posts and reels that can be accessed at any time. This research aims to develop independent learning resources for acid-base materials using Instagram and determine the validity of the products produced. This type of research is Educational Design Research (EDR) using the Plomp model with limitations to the expert review stage and one to one evaluation to produce prototype III. The research subjects consisted of chemistry lecturers, chemistry teachers, and students of SMAN 1 Koto Baru, Dharmasraya Regency. The research instruments include a needs analysis questionnaire, validity sheet and one to one evaluation sheet. The validation data was analyzed using the Aiken's V index. The results showed that the developed learning resources were declared valid with a content validity value of V = 0.89 and a construct validity of V = 0.92. The results of the one-to-one evaluation show that the learning resources are understandable, clearly presented, easy to use, and interesting. Based on the results of the practice questions, there is a difference in the level of mastery of the material in students with high, medium and low abilities. ABSTRAK Materi asam basa membahas teori, kekuatan, derajat keasaman, indikator dan titrasi asam basa. Untuk membantu peserta didik memahami materi diperlukan sumber belajar mandiri yang menarik. Salah satu platform yang dapat digunakan adalah Instagram karena mampu menyajikan materi yang lebih menarik dalam bentuk postingan dan reels yang bisa diakses kapan saja. Penelitian ini bertujuan untuk mengembangkan sumber belajar mandiri materi asam basa menggunakan Instagram serta menentukan validitas produk yang dihasilkan. Jenis penelitian ini adalah Educational Design Research (EDR) menggunakan model Plomp dengan batasan sampai tahap expert review dan one to one evaluation menghasilkan prototipe III. Subjek penelitian terdiri atas dosen kimia, guru kimia, dan peserta didik SMAN 1 Koto Baru Kabupaten Dharmasraya. Instrumen penelitian meliputi angket analisis kebutuhan, lembar validitas dan lembar one to one evaluation. Data validasi dianalisis menggunakan indeks Aiken's V. Hasil penelitian menunjukkan bahwa sumber belajar yang dikembangkan dinyatakan valid dengan nilai validitas konten sebesar V = 0,89 dan validitas konstruk sebesar V = 0,92. Hasil one to one evaluation menunjukkan bahwa sumber belajar dapat dipahami, disajikan secara jelas, mudah digunakan, serta menarik. Berdasarkan hasil pengerjaan latihan soal terdapat perbedaan tingkat penguasaan materi pada peserta didik dengan kemampuan tinggi, sedang dan rendah. ]]>
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