eng Science and Education Publishing American Journal of Educational Research 2327-6150 2020-05-28 8 5 347 352 10.12691/education-8-5-19 EDUCATION20208519 article Apeh H.A. hosea.apeh@uniabuja.edu.ng 1 Usman M.B. 2 Idris M.A. 2 Department of Educational Foundations, University of Abuja, Abuja-Nigeria Department of Guidance and Counselling, University of Abuja, Abuja-Nigeria The study investigated teacher's job stress as a psychological predictor of senior secondary school teachers' effectiveness in the Federal Capital Territory Abuja, Nigeria. The study employed a descriptive survey design. One hundred and sixty-eight participants (principals and teachers) were drawn from the sampled schools. Two self-designed instruments namely: Teachers' Job Stress Scale (TJSS) and Principals' Assessment of Teachers Instrument (PATEI) were duly validated and tested for reliability were used to obtain information from the participants. Data collected were analyzed using descriptive and inferential statistics (Regression and t-test). The study revealed that teacher's effectiveness was poor and job stress low. There was negative and no significant relationship between teachers' job stress and effectiveness. Thus, increase in stress may not lead to increase in teaching effectiveness. There was also no gender difference in job effectiveness and stress among teachers. It is recommended that; stressing conditions be addressed and necessary palliatives be made available to relieve the teacher and thus improve overall teaching effectiveness. http://pubs.sciepub.com/education/8/5/19/education-8-5-19.pdf job stress sociological predictor teachers¡¯ effectiveness