UPAYA MENINGKATKAN MINAT DAN PRESTASI BELAJAR MATEMATIKA MELALUI METODE PEMBELAJARAN BERBASIS MASALAH SISWA KELAS VIID SMP NEGERI 1 ALIAN

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This  research  has  goal  to  increase  mathematics  interest  and  achievement  of integersubject  ofclassVIIDstudentswithProblemBasedLearningmethodin SMPN1  Alian  Kebumen,  period  year2013/2014.  Theresearch result, after applyingProblemBasedlearningmethod,showstheincreasingofmathematics interestandachievementbyfulfillingminimumcompletenesscriteria(KKM).It isshownbyincreasing69,95%pre-cyclestudentslearninginterestquestionnaire. Thefirstcyclestudyinterestincreasedto79,71%.Thesecondone increased 84,95%.Thestudentachievementofmathematicshasalsoincreased,itcanbe seen by average point of pre-cycle that is 55,03.  The  learning  achievement increased  68,25  in  first  cycle  and  78,55  in  second  cycle.  It is suggested to teachersuseProblemBasedLearningmethodinmathematicsteachingtoother subjects as analternativewaytoincreaseinterestandachievementstudent.