Abstract
This action research aims to improve students' written communication skills in the aspect of information and data representation skills (IDRS) in Basic Physics Courses through learning using virtual lab-based video tutorials.The research subjects consisted of 26 students of the Science Education Study Program who took the 2020/2021 Basic Physics Course.The research instrument was in the form of a test sheet for IDRS.The impact of treatment is described through the average test score and the level of effectiveness of using virtual lab-based video tutorials.Based on the pretest and posttest scores, it is known that the students' average N-gain IDRS is in the medium category in the cycle 1, and the high category in the cycles 2 and 3.The number of students who achieved the high category in the cycle 3 has reached more than 75%.Based on the results of the study, it can be concluded that learning physics using video tutorials based on virtual labs has a high effectiveness in increasing students' IDRS.