Paradigm shift in language education has caused many countries including Iran to reshuffle their public EFL educational program. However, such a promising trend in Iran has entailed serious challenges, which necessitated this study aimed at collecting data from 70 teachers and 70 students to investigate the CLT challenges in terms of both teachers' pedagogical and assessment areas. A Partial Least Square Model (PLSM) addressed these two variables. The findings showed that the first three sub-traits of both CLT and testing knowledge have varying contributions to the main latent variables, respectively. Second, Friedman test indicated lack of compatibility between the respective dimensions as to the implementation of the program. Third, the post-hoc comparison tests revealed that teachers perceived CLT significantly lower than the three areas of CLT testing, knowledge of CLT tests and knowledge of developing CLT tests. Also, their knowledge of characteristics of CLT was significantly lower than their perceptions of CLT testing, and knowledge of CLT tests. However, their knowledge of the characteristics of CLT was not significantly different from that of developing CLT tests. Finally, their knowledge of techniques in CLT was significantly lower than their perceptions of CLT testing, knowledge of CLT tests, and knowledge of developing CLT tests. In sum, the Iranian public EFL program still suffers from both implementation and assessment challenges necessitating remedial teacher education program.
