<![CDATA[This study aims to improve the literacy skills of fifth-grade students at SD Negeri 3 Bongan through the implementation of high-quality reading books in a classroom action research (CAR) design. Data from the pre-cycle phase revealed low literacy mastery, with only 37.5% of students (9 out of 24) achieving the minimum completeness criteria (≥70), primarily due to monotonous lecture-based instruction using conventional textbooks. The CAR was conducted in two cycles, each consisting of planning, action, observation, and reflection stages. Interventions included the use of Ministry of Education’s high-quality reading books combined with differentiated read-aloud strategies for low-ability readers. Results showed a significant increase in classical learning completeness: 75.0% in Cycle I and 91.7% in Cycle II, surpassing the success indicator of ≥80%. Qualitative observations also confirmed higher student engagement and focus during lessons. These findings indicate that contextually relevant, high-quality reading materials—when integrated with responsive teaching strategies—effectively enhance literacy development in elementary settings. The study contributes to practical insights for teachers in optimizing existing national learning resources to support AKM-oriented literacy instruction. Keywords: literacy skills, classroom action research, high-quality reading books, elementary education, AKM]]>
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