Abstract
This study discusses development of paired cards using problem based learning model on learning outcomes and students critical thinking skills on the oxidation reduction reactions. This study aims to find out learning outcomes and critical thinking students who taught with problem based learning model using paired cards. The populations were all students of class X MIA in High School, which consists of eight classes with a total number of students 296 students. The sample was taken by random sampling techniques is experimental class and control class. Students in experimental class were taught using problem based learning model, while control class were taught using direct instruction model. The results showed that average for the student learning outcomes 75.16 for experimental class and 70.63 for control class. The average students critical thinking skills were 40.17% for experimental class and 31.49% for control class. The student learning outcomes and critical thinking skills use problem based learning models with paired card was higher than the direct instruction model on the reduction oxidation reaction. There is a positive correlation between learning outcomes and students critical thinking skills. Keywords: Paired cards; problem based learning; oxidation reduction reaction
Highlights
Chemistry is a subject that is not just a theory but is closely related to daily life
Problem based learning (PBL) is a learning model that requires students to understand a concept of learning through situations and problems with problem solving approach that presented at the beginning of learning (Wasonowatiet al. 2014; Silaban and Simangunsong, 2015; Purba et al 2018)
The experimental class was taught by problem based learning model and post-test was obtained, post-test average = 75.16
Summary
Chemistry is a subject that is not just a theory but is closely related to daily life. Always dealing with problems and solving them so that it is said to be difficult subject matter (Dewi and Handayani, 2015). Oxidation reduction reaction is one of topic for chemistry class X high school which is considered difficult. Characteristics of this topic require the ability to understand, memorize, calculate and analyze and the activity of students to practice in order to understand concept (Purnamawati et al 2014). The difficulty of students in learning concepts can lead to conceptual errors. Oxidation reduction reaction topic has delivered to student by problem-based learning model. Problem based learning model need critical thinking skills which students can be trained to explore, inquiry, discover and solve problems (Widana et al 2018; Panggabean et al 2019)
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