DEVELOPMENT
OF SCIENCE LEARNING DEVICES USING PBL (Problem
Based Learning ) MODEL ON HUMAN DIGESTIVE SYSTEM MATERIALS TO IMPROVE
CRITICAL THINKING SKILLS OF STUDENTS AT SMPN 02 SUBOH
Wihdatul
Istiqah . 2021. Development of
Science Learning Devices Using the PBL (Problem
Based Learning ) Model on Human Digestive System Materials to Improve
Students' Critical Thinking Skills at SMPN 02 Suboh. Thesis. Science Education
Study Program. Surabaya State University Postgraduate Program. Supervisor: (I)
Prof. Dr. Hj. Rudiana Agustini, M.Pd, and (II) Dr. Widowati Budijastuti, M.Sc.
Keywords : Devices, Problem-Based
Learning, Critical thinking skills
The Indonesian government continues to strive to
improve the quality of education, one of which is in science education by
increasing the life skills and soft skills of students, so that they are able
to compete in the era of globalization. The purpose of this research is to
produce problem-based learning tools to improve the critical thinking skills of
students at SMPN 02 Suboh that are feasible based on validity, practicality,
and effectiveness. The learning device was developed using the Dick and Carey
model development design. The trial was conducted on 20 students. Validity is
seen from the results of the validation of the Syllabus, RPP, Teaching
Materials, LKPD, and Critical Thinking Skills Assessment Instruments.
Practicality is seen from the implementation of lesson plans, constraints, and
activities of students in the learning process. The effectiveness is seen from
the results of the pretest and posttest of critical thinking skills and student
response questionnaires. The results of the validity of the syllabus, lesson
plans, teaching materials, LKPD and critical thinking skills assessment
instruments are 100%, 100%, 95%, 95%, and 97% so that the device can be said to
be valid and reliable. The implementation of the lesson plans was 97.5% in the
very good and reliable category, as well as the activities of students who were
very interested in participating in learning activities, especially in the
aspect of food testing. The effectiveness is seen from the results of the
pretest and posttest that before the implementation of learning with the
problem-based learning model, no student got the KKM score, while after the
trial was carried out on 20 students, 10% of the students got enough category
and 90% of the students got high category for critical thinking skills. Based
on the calculation of N-gain the average result is 0.78 in the high category.
The responses of students showed an interest in the learning process by 99%
with a very effective category. The tools developed are valid, practical, and
effective so that they are feasible to improve the critical thinking skills of
SMPN 02 Suboh students .