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All Journal Lensa: Jurnal Kependidikan Fisika AL-KHAZINI: JURNAL PENDIDIKAN FISIKA
Pandiangan, Jelita Anggriani
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Astronomy Chemistry Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Physics

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Analysis of Understanding Concepts and Obstacles to Understanding Concepts of Thermodynamics in Physics Lessons Pandiangan, Jelita Anggriani
Al-Khazini Vol 4 No 2 (2024): OKTOBER
Publisher : UIN Alauddin Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/al-khazini.v4i2.42972

Abstract

This study aims to analyze the concept understanding and concept understanding constraints of students of class XI IPA 1 SMA Negeri 1 Dolok Batu Nanggar on thermodynamic material in physics lessons. The research method used in this research is a quantitative descriptive method with a research sample of 30 students of class XI IPA 1 SMA Negeri 1 Dolok Batu Nanggar. The instrument used is a questionnaire containing questions about thermodynamic concepts.The results showed (1) The understanding of the concept of students in class XI IPA 1 at SMA Negeri 1 Dolok Batu Nanggar is categorized as moderate in terms of understanding the concept of Thermodynamics material in physics lessons with a percentage of 50%. (2) The highest obstacle experienced by students of class XI IPA 1 at SMA Negeri 1 Dolok Batu Nanggar in understanding the concept of thermodynamic material in physics lessons is the lack of supporting resources such as textbooks or additional learning materials which makes thermodynamics difficult to understand by students with a percentage of 80%. (3) The concept of thermodynamics that is most difficult to understand by students of class XI IPA 1 at SMA Negeri 1 Dolok Batu Nanggar in thermodynamics material is that students find it difficult to understand the carnot cycle series shown in a graph with a percentage result of 63.3%.  
Penerapan LKPD Berbasis Project Based Learning (PjBL) Pada Materi Fluida Dinamis Pandiangan, Jelita Anggriani; Hakim , Abd
Lensa: Jurnal Kependidikan Fisika Vol. 13 No. 2: December 2025
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/j-lkf.v13i2.17833

Abstract

The background of this study stems from the unavailability of Project-Based Learning (PjBL) model-based Student Worksheets (LKPD) used in high school physics instruction. The objective of this research was to develop a PjBL-based LKPD for the Dynamic Fluids topic at SMA Negeri 14 Medan. This study employed a Research and Development (R&D) approach using the ADDIE development model. The research subjects included material experts, media experts, learning experts, and 36 students from class XI-1 of SMA Negeri 14 Medan. The instruments used consisted of validation questionnaires completed by experts, observation sheets, interviews, and pretest-posttest assessments. The findings revealed that the developed LKPD met the criteria of validity, with validation scores of 78% from material experts, 75% from media experts, and 79.1% from learning experts. In terms of practicality, the LKPD was rated very practical, with student assessments scoring 92.3% and teacher assessments scoring 90.2%. The effectiveness test, measured using normalized gain (N-gain), yielded a score of 0.77, categorized as high. Thus, it can be concluded that the Project-Based Learning (PjBL)-based LKPD developed in this study is valid, highly practical, and effective for use in physics education.
Co-Authors Hakim , Abd