Microteaching is a technique through which the pupil-teacher chooses a single concept of content to deliver a short lesson to a small group of pupils for a short period of time-based on a single teaching skill. In this study, the researchers investigated the effect of the micro-teaching approach on the behavior modification of pupil teachers at the secondary level of education. For this study, the researchers developed the ‘Teaching Skills Observation Scale’ to analyze pupil teachers’ teaching behavior. The study found a positive effect of the micro-teaching approach on the behavior modification of pupil teachers. Significant differences have been found between the mean scores of science stream pupil teachers and social science stream pupil teachers at the first and final observation. The study also found that the mean scores of female pupil teachers were much higher than the mean scores of male pupil teachers at both the first and final observation.