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This study aims to determine the increase in mastery of concepts in inquiry learning science through simple concrete media. This research is expected to help teachers solve the problems of learning science at the elementary school level. The research approach used quantitative research with a quasi-experimental method and a nonequivalent control group design. The study involved 60 fifth grade students of SDN 1 Nagrikidul, Purwakarta district. In the control class, conventional learning assisted by audio-visual media is applied. And the experimental class applied science learning by inquiry using concrete media. The results showed that the gain normalization test for increasing the mastery of science concepts in the experimental class (N-gain 0.44) was greater than the control class's gain value (N-gain 0.23). Based on the test results, the difference between the two means is obtained count = 3.368 ttable = 2.045, with a sig. 0.002 α amounting to 0.05, then H0 is rejected, and Ha is accepted. Therefore Inquiry science learning by utilizing concrete media can significantly improve the mastery of science concepts in elementary school students.

This study aims to determine the improvement of science process skills with the media using concrete in science learning by inquiry.  The study was conducted using a quasi-experimental design with a nonequivalent control group design.  In the experimental group applied to learn to utilize concrete media in learning science in an inquiry, while the control class applied to conventional learning utilizing audio-visual media. Subject: The study included 60 students of class V Elementary School performances in Purwakarta district. The test results for the normalization gain skills enhancement process gain values obtained experimental class (N-gain 0.46) is greater than the value of the class gain control (N-gain 0.17).  Based on the test results mean difference two improvements by using the t-test, obtained t = 2.688 table = 2.045, with sig. 0.012 α 0.05 then H0 is rejected and Ha.  Therefore, inquiry science learning by utilizing concrete media can significantly improve students' science process skills.

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