Mathematics is one of the subjects that spearheads in other subjects. Mathematics is studied starting from elementary school to equip students with the ability to logically thought, analytically, systematically, critically, creatively, and the ability to work together. The sequential stages of aspects in mathematics are numbers, geometry and measurement and data processing. From the stages of the aspects mentioned it appears that the subject matter of numbers is the initial stage that must be mastered in mathematics. Numbers are the basic subjects that are very important for students to understand because they are the basic for other subjects. Integers is one of the mathematic subject. For this reason, this study aims to develop teaching materials in the form of student worksheet integer operation material for elementary school students. This research is the initial stage of development research. The subjectsof research were fourth grade students of elementary schools number 42 Pangkalpinang. The process of developing needs analysis teaching materials, modules are developed on concepts that are still not mastered by students, planning of unknow concepts by students, and developed to determine SK, basic competencies, indicators, syllabus, lesson plans, determining student worksheet elements, collect to material, prepare student worksheet drafts, and validate. From the design of this prototype produced the first prototype of the integer operation student worksheet for fourth grade elementary school students.
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