THE DEVELOPMENT OFELECTRIC CIRCUIT’S PRACTICUM BASED ON PROBLEM TOWARDTHE SCIENTIFIC INQUIRY SKILL’S OF COLLEGE STUDENT IN ALTERNATING CURRENT TOPIC

The objective of this research is to determine the effect of model scientific inquiry-based on
problem to student achievement on scientific inquiry of college student by developing a model of
electric circuit’s practicum based on problem. The Method of this research is research and
development (R&D) with steps 4D (define, design, develop, and disseminate). Researcher used true
experimental method with randomized pretest-posttest control group design in testing of wide scale.
Population in this research for testing of wide scale was all of state university of Medan’s student who
have contract with electric circuit’s practicum. Sample in this research consist of two groups,
experiment group by applying model teaching based on proble, where the number of college student’s
was 33 persons and control group by applying conventional teaching, where the number of college
student’s was 34 persons. The method which are used to collect data in this research was test
organized as essay to measure scientific inquiry achievement. Based on the result in testing of wide
scale showed that teaching electric circuit based on problem, which has been developed significanly,
has affected the achievement of scientific inquiry of college student. The percentage of college student
development N-gain scientific inquiry was 56% in average while in control class 32% in low
category. Over all the model of teaching that developed was effectively used in teaching electric
circuit’s practicum in alternating current topic