<![CDATA[Speaking skill is one of the essential language competencies that should be developed among elementary school students. Preliminary observations conducted in Grade V of SDN 1 Trembulrejo revealed that students' speaking skills were still relatively low. This study aimed to improve students' speaking skills through the use of serial picture media in Indonesian language learning. The research employed a Classroom Action Research design based on the Kemmis and McTaggart model, which was conducted in two cycles. The participants consisted of 19 fifth-grade students of SDN 1 Trembulrejo, Blora Regency. Data were collected through observation, interviews, and documentation. Data analysis was carried out by comparing the percentage of learning mastery and the average speaking skill achievement across each cycle. The findings indicated a gradual improvement in students' speaking skills. Classical mastery increased from 52.63% in the pre-cycle stage, with an average score of 66.00, to 68.42% in Cycle I, with an average score of 72.40. After improvements were implemented in Cycle II, classical mastery increased to 84.21%, with an average score of 79.20. The use of serial picture media helped students develop ideas, enrich vocabulary, build confidence in speaking, and present stories more coherently. These findings suggest that serial picture media is effective in improving elementary school students’ speaking skills. ABSTRAK Keterampilan berbicara merupakan salah satu kemampuan berbahasa yang perlu dikembangkan pada siswa sekolah dasar. Hasil observasi awal di kelas V SDN 1 Trembulrejo menunjukkan bahwa keterampilan berbicara siswa masih rendah. Penelitian ini bertujuan meningkatkan keterampilan berbicara siswa melalui penggunaan media gambar berseri dalam pembelajaran Bahasa Indonesia. Penelitian menggunakan metode Penelitian Tindakan Kelas model Kemmis dan McTaggart yang dilaksanakan dalam dua siklus. Subjek penelitian berjumlah 19 siswa kelas V SDN 1 Trembulrejo Kabupaten Blora. Data dikumpulkan melalui observasi, wawancara, dan dokumentasi. Analisis data dilakukan dengan membandingkan persentase ketuntasan dan rata-rata capaian keterampilan berbicara pada setiap siklus. Hasil penelitian menunjukkan bahwa keterampilan berbicara siswa mengalami peningkatan secara bertahap. Ketuntasan klasikal meningkat dari 52,63% pada pra-siklus dengan rata-rata capaian 66,00 menjadi 68,42% pada siklus I dengan rata-rata 72,40. Setelah dilakukan perbaikan tindakan pada siklus II, ketuntasan klasikal meningkat menjadi 84,21% dengan rata-rata capaian 79,20. Media gambar berseri membantu siswa mengembangkan ide, memperkaya kosakata, meningkatkan keberanian berbicara, dan menyampaikan cerita secara lebih runtut. Temuan ini menunjukkan bahwa media gambar berseri efektif digunakan untuk meningkatkan keterampilan berbicara siswa sekolah dasar.  ]]>
