<![CDATA[This study aims to improve students' learning outcomes in learning mathematics by applying Bruner's theory. This research is a classroom action research. The study was conducted at SMPN 2 Ngabang. The subjects were seventh grades students in semester II 2018/2019 academic year which consists of 41 students. The object of this research is mathematics learning. This study concludes that: 1) The process of learning mathematics is boring which makes students bored because the methods, media and models that the teacher uses cannot attract students' interest and attention so students can't be focused and passive in interacting with the teacher. 2) Learning mathematics is essentially learning about the relationship between concepts in mathematical material, thus making students easy to understand the subject materials. 3) Activities that students do in 3 stages; active, iconic, and symbolic make students active. 4) With activities, students can easily find out the answers of what, how, and why in a case, especially students can understand about the material which is being studied easily. Keywords: Bruner's theory, mathematics, learning outcomes]]>
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