Development of Mathematics Learning Instrument Based on Problem Based Learning to Improve Students' Mathematical Critical Thinking Skill of Student in Class X Vocational High School

摘要

The analysis result of preliminary research conducted at Vocational High School 6 Padang revealed that students' mathematical critical thinking skill has yet to be made optimum. One of the reason is the unavailability of learning device to facilitate students to improve their mathematical critical thinking skill. This is the motivation to develop mathematics learning instrument in the forms of Lesson Plan (RPP) and Student Worksheet (LKPD) with Problem Based Learning which involves students directly to find the concept of learning material by themselves to allow comprehension of the knowledge for both oral and written. Data were collected through observation, documentation, questionnaire and interview. The research subject is students of class X Culinary in Public Vocational High School 6 Padang. This is a development research employing Plomp model which consists of needs analysis, student needs analysis, curriculum analysis, and concept analysis. The prototype stage is to design products such as RPP and LKPD with Problem Based Learning, and then to conduct the formative evaluation to determine product validity and practicality. The assessment phase is to conduct a practicality test and effectiveness test. The purpose of this research is to produce mathematical learning instrument with problem based learning for class X Vocational High School which is valid, practical and effective.