The purpose of this study was to test alternative casual models of relation among motivational (self- efficacy, control beliefs of learning, and test anxiety), cognitive and metacognitive (critical thinking, metacog-nition, self-regulation, time management, and peer help seeking) variables, and academic achievement in female high school students studying in the mathematics branch. The sample was selected through multistage cluster sampling. two hundred fifty female high school students in the mathematics branch were selected. Some subscales of the Motiva-tional Strategies for Learning Questionnaire (MSLQ, Pintrich et al., 1991) were used. The students’ average scores in five specific courses at the end of the academic year were considered as the index for their academic achievement. Data was analyzed by Cronbach's alpha, confir-matory and exploratory factor analysis, and path analysis. The present study tested two casual models. Although the two models were supported by the obtained results, the goodness of fit indices of the second model was better. The first model indicated that time and environment management has a mediating role in relations among test anxiety, self-efficacy, control of learning beliefs, and academic achievement. The second model indicated that test anxiety had a mediating role in relations among time and environment management, peer help seeking, and academic achievement. The models indicated that self-efficacy had a positive, significant, and direct effect on academic achievement. Test anxiety had a significant, negative, and direct effect on academic achievement.