<![CDATA[Problems that occur in science learning in the Ngudi Cluster Rahayu is ability breakdown students science problems class V still low one of them Because lack of Complete teaching materials on the eye science lessons. Development science based module scientific is one of the efforts that can maximize ability breakdown problem And allow participant educate For develop independence learning. The purpose of study This is (1) to develop science based module scientific material Valid Water Cycle for student class V, (2) develop module Science based on scientific material Cycle Practical water, ( 3 ) analyzing effectiveness development science based module scientific material Water Cycle in increase ability breakdown problem For student class V.Type study is research and development ( Research and Development ) with steps from Borg And Gall, with ten step development. Source information are teachers and elementary school students in the Ngudi Cluster Grace Subdistrict Mranggen. Collection data with use observation, interview, And questionnaire. Analysis data study This use descriptive qualitative For evaluate validity and practicality module and t-test for test effectiveness module. Results study is 1) a science module based on scientific stated valid used in learning Science on student class V based on results validation media ( score 82%) And validation material ( score) 85%) 2) module Science based on scientific stated very practical used in learning Science for students class V based on response students ( score 86%) And teacher response ( score 80%) 3) science module based on scientific effective used in science learning for students class V for increase ability breakdown science problems based on limited test results with t count > t table (9.445 > 2.0244).]]>
