This study aims to determine the validation of Integrated Natural Science teacher book with the theme senses of sight and optical devices using Connected model Integrated 21st Century Learning at the junior high school in Kerinci district. This research method used research and development, using Plomp development model. The instrument used was a validation questionnaire. The data collection technique uses a validation questionnaire that was previously validated by five validators. Data collected was analyzed using descriptive qualitative through assessment and percentage. Results of analysis the validation of Integrated Natural Science teacher book with the theme senses of sight and optical devices using Connected model Integrated 21st Century Learning has an average value of 0,88 this is showed that is developed was valid.
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