The present study aims to find out the teacher effectiveness of secondary school teachers in relation to type of school, gender, locality and level of experience. The sample consists of 100 teachers from Sirsa District of Haryana. Teacher effectiveness scale constructed and validated by Dr. (Mrs.) Umme Kulsum (2011) ^[5] was used for collecting data and it is a self-scoring schedule. The result is found that the teacher effectiveness of government school teachers is higher than private school teachers, gender and locality does not have any significant role in teacher effectiveness. Results of the study reveals that the teachers having more than ten years of experience are highly effective as compared to those having less than 10 years of experience in secondary schools. Descriptive method was used for analysis of present study.