<![CDATA[This study aims to development of Student Worksheet based Project Based Learning on approximations that are valid, feasible, effective, and improve the Mathematical literacy skills of grade V students. This research is research and development (R&D) using the ADDIE model which consists of five stages namely Analysis, Design, Development, Implementation, and Evaluation. The subjects in the study was V students at SD Negeri Jangkat. The research instrument used validation sheets, student response questionnaire sheets and question test sheets. Data from the development of Student Worksheet were then analyzed using Gregory calculations and interrater reliability, student responses were analyzed using the Guttman scale with the checklist method as well as quantitative analysis using the t-test. From this study it is known that language validation, material and presentation of Student Worksheet are very suitable for use in learning. Students respon are happy and interested in following the lesson. Based on the N-Gains test from the use of Student Worksheet, a score of 0.75 is in the high category. So that the Mathematical literacy skills of students who use PJBL Student Worksheet is higher than students who do not use Student Worksheet, so that it is declared effective.]]>
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