This study aims to develop a student’s worksheet (LKPD) using learning strategies to improve thinking skills equipped with mind mapping to increase student retention in learning physics. LKPD was developed based on the results of the validation and responses of teachers and students. This research method with the survey development model. The data collection technique used is distributing questionnaires via google form to 128 high school students and 26 high school teachers in Jakarta. The subjects of this research are LKPD and the students of class XI high school 74 in Jakarta. The developed LKPD contains: 1) LKPD cover, 2) table of contents, 3) study instructions, 4) learning competencies or subject matter, 5) supporting information, 6) tasks or work steps, and 7) assessment. Based on the results of observations using a questionnaire via a google form, with 128 students, 40% of students had difficulty remembering learning material for a long time. As many as 46% of students feel helped by LKPD compared to 39% of modules. As many as 96% of teachers stated that LKPD was able to reinforce students on the material being taught. Student retention shows that an n-gain value of 0.7 with this LKPD is very effective.