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The power of mathematical representation by applying concepts needs to be improved so that students can remember mathematical concepts sustainably. The purpose of this study to development and describe the process of interactive online media learning using a geogebra aid easyclass to help students represent mathematically on linear program materials. Research model is research dan development 4-D Thiagarajan. Twenty-four sophomores of science 4 man 2 jember. Media is tested based on three criteria that are valid, practical and effective. Validity of learning media when reaching high categories with correlation coefficient values (α) > 0,6. The practicality of learning media when achieving good categories with a percentage > 60%. The effectiveness of learning media when the average score of a student’s study results tests meets completedness, 80% of all students get a score greater or equal to the Minimum Completed Criteria = 75. Studies show 0.917 correlation value and therefore valid to a very high category. Practical analysis based on student responses indicates a percentage of 99 percent so it is stated practical by excellent criteria. The effectiveness is analyzed based on a student’s mathematical representation on a matter and quiz exercise when after using the learning media. Based on data analysis, interactive online learning media use a geogebra aid linier program material meets valiant criteria, practicality and effectiveness so that media can help students reflect mathematically on the linear program material and can be used for learning activities.

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