<![CDATA[Inappropriate learning processes can lead to low learning results and student inactivity. This research (PTK) aims to improve learning outcomes and activeness of students in VIIH class of SMP Negeri 6 Salatiga students in rectangular and triangular material through Numbered Heads Together (NHT) learning application model. The model used in this research is Kemmis & Mc Taggart spiral model. It shows that the average result in the class is 64,4 (have not reach the minimum requirement) with percentage in passing the requirement of 46.40%. In cycle 2, the result increased with passing the average grade of 81.2 (fulfilling KKM) with percentage of 75% for passing grade requirement. Student activeness is increasing along with the learning outcomes. However, average category or high category on the 1st cycle is at 50,14%, while on the 2nd cycle, it can reach out to 80% or more. The two results concluded that implementing NHT could improve learning outcomes and activeness of students in VIIH class of SMPN 6 Salatiga.]]>
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