PENGEMBANGAN PERANGKAT PEMBELAJARAN BERBASIS MASALAH UNTUK MENINGKATKAN KEMAMPUAN BERPIKIR KRITIS DAN PEMAHAMAN KONSEP PADA MATERI PENCEMARAN LINGKUNGAN DI SMA NEGERI 1 TELAGA

Abstract

The result showed that (1) according to material expert, the problem-based
learning was seen through obtained 83.75 % and included excellent quality
because it stood between 81% and 100%; according to education expert, learning
tools (syllabus, lesson plan, student worksheet, evaluation item) were excellent
since it stood between 81% 100%; and overall assessing aspects of syllabus was
82.5%, lesson plan was 83.33%, student worksheet was 85.22%, evaluation items
were 81.25%; (2) the ability of critical thinking increased since problem-based
learning was applied. It could be verified though pretes score on the ability of
thingking was low category and posstest was excellent, good, and sufficien; (3)
doncept understanding of student increased since they participated in the class,
and it could be confirmed by score acquired and categorized into excellent (11%),
good (78%), and sufficient (11%).
Keyword: problem-based learning, environmental pollution, ability of critical
thingking, concept understanding.