The implementation of learning, especially Physics, is currently based on the results of observations stillexperiencing several obstacles. The tendency of passive students and learning outcomes as part of studentsstill shows results that have not been maximal. Based on this fact, this classroom action research was carriedout to improve the learning process and physics learning outcomes of students in the fluid material in classXI IPA1 SMA 4 Pekanbaru, using PHET (Physics Education Technology) media. The type of researchconducted is classroom action research consisting of 2 cycles, with the subject are students of class XI SMANegeri 4 Pekanbaru. Time for the implementation of odd semester 2018/2019 academic year. Data collectiontechniques used observation sheet instruments for learning activities and fluid material test sheets for physicslearning outcomes. Data is analyzed descriptively in percentage representation. The results of the researchshowed that the learning activities of students had increased from cycle I to cycle II. Furthermore, forphysics learning outcomes, students increase from the first cycle to cycle II, with the average results obtainedby the good category. Therefore, the application of PHET-based information technology simulation media inphysics learning can improve learning activeness and learning outcomes of class XI students of SMA 4Pekanbaru.