Teacher effectiveness is the degree of success of a teacher in performing instructional and other duties specified in his contract and demanded by the nature of his position. Generally Teaching is delivered by a teacher to enhance the amount of learning of a learner. To make learning more meaningful, understandable and fruitful to a learner, effectiveness of teaching delivered by a teacher is very essential condition. The present study is an attempt has been made by the investigators to study the level of Teacher Effectiveness of teachers working in B.Ed. colleges who are working in different Universities & Government and Private-unaided B.Ed. colleges in Rayalaseema Region of Andhra Pradesh State. The investigators have used Survey method for the present study. The investigators have developed a Teacher Effectiveness Rating Scale with different dimensions (motivational aspects, classroom management, professional competences, and intra and interpersonal relationship) to measure the teacher effectiveness of teachers working in B.Ed. colleges. The random sampling technique has been used for the selection of sample. For the analysis of data Mean, S.D., t-Test and Graphs have been used by the investigators in the present study. The overall results of the study explore that the level of teacher effectiveness of teachers working in B.Ed. colleges is moderately effective. It is also revealed that Teacher Effectiveness of University & Government B.Ed. college teachers are comparatively better than that of the teachers who are working in different Private-unaided B.Ed. colleges in Rayalaseema Region.