<![CDATA[Device props that developed is smartphone projector that was equipped by student work sheets. Smartphone projector props from simple materials and easy to find intheform of a water-filled bulb that the system works like a convex lens, so it can produce real, inverted, and zoomed in shadow properties. Student work sheets as a supplement containing the props instruction, material reviews, and evaluation questions. The result of feasibility test of practicum device categorized as very high with percentage 87.64%. Research and Development in the form of Pretest and Postest One Group Design carried out for thr test of respondents. This research was held in junior high school 3 Juwana. The effectiveness test analysis was performed by the N-Gain <g> test and questionnaire student response. Validation results by validators for smartphone projector with student work sheets showed average score of 87.64%, so the tool props are very suitable to use as instructional media. N-Gain test analysis showed pretest-posttest results were classified as medium criterion with a <g> value of 0.589 and 82.35% classical completeness that is high. The results of the analysis of student responses show the value of 78.76 with positive criteria
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