<![CDATA[This Classroom Action Research aims to increase learning motivation and student achievement in Physics learning in XTL2 grade SMK Negeri 3 Yogyakarta through the Group Investigation (GI) model in learning Fluid and Wave Competence Physics. This study was conducted in two cycles, each cycle consisting of 2-3 meetings, each meeting with an allocation of 3 lesson hours. Each cycle includes four steps, namely planning, action, observation and reflection. The results showed that the increase in motivation to learn in the first cycle by 75%, in the second cycle of 90.63% an increase of 16.63%. Improvement of the average pre-cycle learning outcomes of 31.09, the first cycle of an average of 65.60 completed 28.13%, in the second cycle an average of 86.28, 68.75% complete. This research is 2 cycles, because in cycle II, learning motivation is more than 80%, and learning achievement achievement is more than 60%, the application of the GI model needs to be applied and continued in learning due to an increase in both learning motivation and learning achievement.]]>
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