The objectives of the study were to identify the followings: (a) The construct validity of their self-concepts; and (b) the differences, if any, between the sexes in their academic attainments.For construct validity, the self-description questionnaire (SDQ) of Marah, Parker and Smith (1983) was adopted for the study and the teacher ratings were also obtained on a 9 point scale for the purpose. Besides, the investigator obtained, their school marks in mathematics, social studies,English and overall mean of the school marks from their previous examination. The self-description questionnaire (SDQ) consisted as of seven categories such physical ability, physical appearance, relationships with peers, relationships with parents, reading, mathematics and school subjects. The mean of the first four category yielded the nor-academic self-concept (NACJ) and the mean of the last category yielded their academic self-concepts (ACD), while the mean of the seven categories gave the investigator their total self-concept (TOT).