design, develop , and disseminate, but the study was only done until the development phase because limitations time and costs. Define phase consists of a front end analysis, the analysis of the student, and analysis tasks. At the design stage to design instructional materials in the form of handouts on the material structure and function of cells, then at some stage develop test the validity by a validator which consists of 2 professors STKIP PGRI West Sumatra and 2 teachers of SMAN 1 IV Nagari Bayang Utara. Test practicalities by 2 teachers and 24 students of class XII Science SMAN 1 IV Nagari Bayang Utara. The data of this study is primary data and analyzed the validity and practicalities questionnaire answers obtained from the validity and practicalities.Validity test results handout that comes mindmap by validator indicates that this handout at very valid criteria ie 95.30% in terms of the requirements didaktif, construction and technical. Practicalities of test results by teacher and student handouts showed that this mindmap handout that comes in a very practical criterion is 94.29% and 88.37% in terms of ease of use, usefulness and efficiency of the learning time. It can be concluded that comes mindmap handouts on the material structure and function of cells produced have met the criteria very valid and very practical.
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