This research aims to 1) study remote learning activities with competency-simulated classroom to promote the online teaching abilities of computer teacher students, 2) assess the suitability of learning activities, and 3) find out the effectiveness of learning activities according to the criteria of 80/80. Participants were 24 third-year students from one university in Thailand. Research instruments include remote learning activities with competency-simulated classroom, achievement test, and online teaching proficiency assessments, statistics in data analysis include percentage, mean, standard deviation, and t-test. The results showed that remote learning activities with competency-simulated classroom, consisting of 3 preparation stage, teaching stage, and evaluation stage. The appropriate evaluation of learning activities is at the highest level, and the effectiveness of learning activities improved with efficiency is 80.85/81.15 which is met the requirement of criteria.