The study explored teacher's participation in quality assurance in private and public secondary schools in Uyo Local Education Committee, Akwa Ibom State. Four research questions and four null hypotheses were raised to guide the study. The ex-post facto survey design was used to carry out this study. The population of the study comprised 64 principals distributed into 64 private and public schools in Uyo Local Education Committee. Random sampling technique was used to select 28 principals from the 64 schools in the area. A researcher developed instrument titled "Administrators' Perspective of Teachers' Participation in Quality Assurance Questionnaire (APTPQAQ)" was used to gather the data. The reliability of the instrument was determined using Cronbach Alpha analysis. A coefficient value of 0.830 was obtained for the APTPQAQ. Mean and Standard Deviation was used to answer the research questions while independent t-test was used in analyzing the hypotheses at 0.05 level of significance. The findings revealed that private and public schools significantly differ in quality assurance based on teachers' participation in instructional delivery, classroom management, evaluation activities and communication skills. Based on the findings of this study, it is recommended among others that, administrators should ensure that teachers monitors students through a variety of appropriate evaluation techniques in both privaate and public schools in order to ensure that the areas where the students are not doing so well are re-visited.