The Effectiveness of Unplugged Coding and Artificial Intelligence (KKA) Learning in Improving the Computational Thinking Ability of Primary School Students
Abstract
The Indonesian Ministry of Education has formally introduced Coding and Artificial Intelligence (Koding dan Kecerdasan Artifisial, KKA) as a learning content area for primary and secondary education, yet many primary schools remain constrained by limited digital infrastructure and low teacher technological readiness. This study evaluates the effectiveness of an unplugged-based KKA instructional model in improving the computational thinking ability of fifth-grade primary school students. The model integrates two phases, namely unplugged coding activities that build conceptual foundations through concrete manipulation and an artificial intelligence phase combining age-appropriate AI literacy with AI-assisted tutoring support. A quasi-experimental design using a non-equivalent pretest-posttest control group was applied to 64 students from two state primary schools in Bojonegoro Regency, divided into an experimental group (n = 32) receiving the KKA model and a control group (n = 32) receiving conventional expository instruction. Computational thinking was measured through a validated Bebras-based test covering decomposition, pattern recognition, abstraction, and algorithmic thinking. Data were analysed using normality and homogeneity tests, an independent sample t-test, the normalised gain score, and Cohen’s effect size. The experimental group achieved a mean posttest score of 82.19 against 68.44 in the control group, with a normalised gain of 0.66 (moderate-to-high) compared to 0.35 (moderate). The t-test confirmed a statistically significant difference (t = 6.473; p < 0.001), and the effect size of d = 1.62 indicated a large practical impact. The KKA model proved most influential on algorithmic thinking and decomposition while also strengthening engagement and collaborative problem solving. The study contributes a structured, low-cost, and policy-aligned instructional model that addresses the equity gap in computational thinking education for resource-limited primary schools.
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