https://www.siducat.org/index.php/isej <p align="justify">ISEJ : Indonesian Science Education Journal is a medium of communication used by researchers, lecturers, teachers, practitioners, and University student for submitting result of studies and prioritized result of the study and review of the literature in the sphere of natural science education in primary education, secondary education and higher education. Additionally, this journal also covers the issues of environmental education &amp; environmental science.</p> Yayasan Darussalam Bengkulu en-US ISEJ : Indonesian Science Education Journal 2716-3350 <p>Authors who publish with <strong>ISEJ: Indonesian Science Education Journal</strong>&nbsp;agree to the following terms:</p> <ol> <li>Authors retain copyright and grant the <strong>ISEJ: Indonesian Science Education Journal</strong> right of first publication with the work simultaneously licensed under&nbsp;<strong>Creative Commons Attribution License</strong>&nbsp;<strong><a href="http://creativecommons.org/licenses/by/4.0/">(CC BY 4.0)</a></strong>&nbsp;that allows others to share the work with an acknowledgment of the work's authorship and initial publication in this journal.</li> <li>Authors can enter into separate, additional contractual arrangements for the non-exclusive distribution of the published version of the work (e.g., post it to an institutional repository or edit it in a book), with an acknowledgment of its initial publication in this journal.</li> <li>Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) before and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work.</li> </ol> https://www.siducat.org/index.php/isej/article/view/1820 <p><em>This study was conducted to develop an Electronic Student Worksheet (E-LKPD) based on Augmented Reality (AR) with the LOK-R (Literacy, Orientation, Collaboration, Reflection) model for Physics on thermodynamics material for grade XI students and to test its effectiveness in improving students' critical thinking skills. The research method used was Research and Development (R&amp;D) with the 4D development model, but limited to the development stage (3D). Data collection methods involved non-test instruments (observation sheets and questionnaires) and a 10-item essay test. The results of the study indicate that: (1) The AR-based Physics E-LKPD with the LOK-R model is highly suitable for use in thermodynamics learning for high school students with a "Very Good" category based on expert validation; (2) The developed E-LKPD can improve students' critical thinking skills (N-gain = 0.73) with a "High" category; and (3) This E-LKPD is effective for learning thermodynamics topics regarding students' critical thinking skills.</em></p> Rizka Dwi Maretha‎ Irwandani Vandan Wiliyanti Copyright (c) 2025 Rizka Dwi Maretha‎, Irwandani, Vandan Wiliyanti https://creativecommons.org/licenses/by/4.0 2025-12-31 2025-12-31 6 3 10.62159/isej.v6i3.1820