Abstract
Classroom environment is not supposed to be attractive for teaching and learning alone but conducive for the test or assessment of the degree of learning taking place there. Classroom tests and examinations are means of establishing a students' level of accomplishment in a given subject. The classroom is expected to protect the learner from the vagaries of weather, air pollution, noise and when tests are to be conducted, the time of the day, invigilation and seating arrangements has to be conducive and appropriate also. The aim of this work is to determine how these environmental factors influence the performance of students in test and examination. The research was conducted using the survey instrument of questionnaire to obtain the perception of the respondents to the effect of environmental factors on learning outcome assessment. The questionnaire was subjected to mean score analysis to obtain respondents satisfaction value of the ordinal data on Likert scale. It is reasonable to assert from the analysis of the data that a test/examination conducted in a poor physical environment, such as those with poor lighting, under poor weather, noisy environment and polluted air will not be conducive to both the student and teacher hence produce poor performance in results of test/examinations. The findings revealed that due to the poor infrastructural development of Nigeria educational system, it is obvious that there is agreement to the effect that the environment factors affect learning. It is therefore advocated that apart from good teachers being employed in our educational system, location of schools should be considered very critically using these environmental parameters before approval is given for its establishment in the country.