The purpose of the present study was to find out whether there is a difference between the Iranian senior college students who have been taught with CTBL and those who have been taught with SAC in regard to their language proficiency (vocabulary, grammar, reading comprehension, and speaking)? This question of the efficacy of the two mentioned methods was likewise addressed to the target groups' different achievers’ language proficiency.
Based on this question, the null hypotheses were formulated as well.