<![CDATA[The aim of this research is producing learning instrument based on the model of learning cycle 7E in trigonometry which are valid, practical and effective. This research refers to the developmental model of Plomp which consists of three phases that are pleminary research, prototyping phase, and assessment phase. The quality of learning instrument based on the test of validity, practicality and effectiveness. Based on data analysis, the results are: the score validity of lesson plan and the students worksheet are 3,54 and 3,44 respectively, the score practicality of lesson plan and the students worksheet are 3,53 and 3,21 respectively, the students’ ability of mathematical connections on aspects of the connection between concepts or procedures in the same material increase from 66 to 81 with high category, the students’ ability of mathematical connections on aspects of the connection between concepts or procedures in matter different mathematics increase from 49,5 to 77,9 with the high category, and the student’s ability of mathematical connections in aspects of the connection between concepts or procedures in the context of daily life increase from 55,8 to 77,4 with the high category. The students’ ability of mathematical connections in classical increased from 57,1 to 78,8 with the high category. Thus, the instrument learning based on the models of learning cycle7E in trigonometry subject for high school students of grade 10 otherwise valid, practical and effective.]]>
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