<![CDATA[ABSTRACT ? The purpose of this research is to ascertain the influence of Problem Based Instruction with audio visualmediatoward biology learning achievement of 10th grade students at SMA Negeri 1 Ngemplak in academic year 2011/2012. The research was quasi experiment research using quantitative approach. The research was designed using posttest only control design. Experimental group applied Problem Based Instruction with audio visualmedia. Control group applied discussion, classical course and question-answer method. The populations of this research were all of 10th degree students at SMA Negeri 1 Ngemplak in academic year 2011/2012. The samples of this research were the students of 10th 3as experiment group and 10th 6as control group. The sample of this research was established by cluster random sampling. The data was collected using questionnaire, multiple choice test,essay test, observation form, and document. The hypotheses analyzed by t-test. The research concluded that application of Problem Based Instruction with audio visualmediahad significant effect toward biology learning achievement in cognitive, affective, and psychomotor of 10th grade students at SMA Negeri 1 Ngemplak in academic year 2011/2012. Keywords: Problem Based Instruction, audio visualmedia, Biology Learning Achievement, Cognitive, Affective, Psychomotor]]>
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