Abstract: This research aimed to improve learning process and mathematics learning outcomes students of class VII.9 SMP Negeri 25 Pekanbaru in the second semester academic years 2013/2014. The research are two cycles, each cycle has four stages, which are planning, implementation, observation, and reflection. At the end of each cycle, daily tests are carried out. Data collected through observation and tests in the form of daily tests. Observation is used to collect teacher and student activities during learning process, test is used to collect mathematic outcomes and will given in form daily test. The results show the activity of teachers and students in learning has been in line with the lesson plan. Most of the students have participated actively in the learning process that has been exercised, such as step-by-step learning, presenting student worksheets or question papers, responding a fellow classmate’s presentation, and giving learning conclusions. Results of this research indicate that the application of Structural Approach to Cooperative Learning Model Numbered Heads Together (NHT) can improve learning process and improve the mathematics learning outcomes math class VII.9 SMP Negeri 25 Pekanbaru in the second semester academic years 2013/2014. Keywords: Learning outcome, Cooperative learning, Numbered Heads Together.
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