<![CDATA[The aim of this research were to produce an interesting and a beneficial learning material based on discovery for the fourth grade of elementary school and also to know effectively can to increase their science learnings outcome. The method that used in this study was Reasearch and Development (RD) method. The instruments that used in collecting data were a questionnaire and multiple choice test. Data were taken from the population and sample in Central Metro 4th Elementary School, 5th Elementary School, and 6th Elementary School with the total number of students as much as 96 students. The data were analyzed by using a Gain-Test. The result of this research showed that the developed learning material was valid, interesting, and beneficial to the fourth grade of elementary school students and the developed learning material based discovery effectively can to increase their science learnings outcome.Penelitian ini bertujuan untuk menghasilkan produk bahan ajar berbasis discovery yang menarik, mudah dan bermanfaat bagi siswa dan mengetahui efektifitas bahan ajar berbasis discovery untuk meningkatkan hasil belajar siswa. Metode yang digunakan adalah penelitian dan pengembangan (Research Development RD). Alat pengumpul data pada penelitian ini menggunakan lembar angket dan soal tes pilihan ganda. Sampel dan populasi penelitian dilakukan di SDN 4 Metro Pusat, SDN 5 Metro Pusat, dan SDN 6 Metro Pusat dengan jumlah seluruh siswa sebanyak 96 orang. Data analisis menggunakan uji Gain. Penelitian ini menghasilkan produk bahan ajar berbasis discovery yang menarik, mudah dan manfaat bagi siswa kelas IV SD dan bahan ajar berbasis discovery yang dikembangkan terbukti efektif terhadap hasil belajar IPA kelas IV di SD.Kata kunci: ilmu pengetahuan alam, bahan ajar, discovery.]]>
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