THE EFFECT OF PROBLEM BASED LEARNING MODEL AND MOTIVATION TO LEARN PHYSICS ON STUDENTS LEARNING OUTCOMES OF HEAT AND TEMPERATURE TOPIC IN CLASS X SMA NEGERI 1 TEBING TINGGI ACADEMIC YEAR 2014/2015

The objectives of this research are: (1) To know difference of Problem based Learning model and Direct Instruction model to students learning outcomes in Heat and Temperature in SMA N 1 Tebing Tinggi class X Academic Year 2014/2015. (2) To determine the differences of student`s that have high motivation and low motivation in the subject matter Heat and Temperature using Problem based Learning Model and Direct Instruction in Class X SMA N 1 Tebing Tinggi, Academic Year 2014/2015 (3) To know the interaction between Problem based Learning model and motivation to learn physics.The type of research was quasi experiment with the population all of student in class X of Science Program even semester in SMA N 1 Tebing Tinggi which consist of 7 classes. Sample of this research was obtained by technique cluster random sampling. The sample is X IPA 4 as the experiment class and X IPA 5 as the control class. Experiment class taught by Problem Based Learning model and control class taught by direct instruction. The research instrument has 5 questions in essay test, the instrument tested validated. The hypothesis testing uses ANOVA 2x2 and Correlation test with SPSS 17.0 software. Based on result and data analyze, the conclusion are: 1. There is different of Problem based Learning model and Direct Instruction model to students learning outcomes. 2. There is different of student`s that have high motivation and low motivation in Problem based Learning Model and Direct Instruction. 3 There is interaction between Problem based Learning model and motivation to learn physics.