The study explores the relationships between students' experiences of the teaching-learning environment and their approaches to learning, and the effects of these variables on academic achievement. Two three-stage models were tested with structural equation modelling techniques. The "Approaches and Study Skills Inventory for Students" (ASSIST) and the "Experiences of Teaching and Learning Questionnaire" (ETLQ) were used to assess approaches to learning and student's experiences of the teaching-learning environment, respectively. These two constructs were then used as either first- or second-stage variables within the path analysis. The model using approaches to learning as a mediating variable showed the best fit with our data; variations in our students' experiences of the teaching-learning environment appear to give rise to their approaches to studying, which subsequently affect their achievement. The deep approach shows no detectable influence on academic achievement in this sample, neither there are any direct effects of experiences of the teaching-learning environment on it. The indirect effects of these experiences on achievement, acting through the strategic and the surface approaches, are related to two aspects of the teaching-learning environment only, namely "congruence and coherence in course organisation," and "integrative learning and critical thinking." The finding of a reciprocal relation between approaches to learning and experiences of the teaching-learning environment supports previous conclusions about the association between these constructs. The indirect effect of experiences of the teaching-learning environment on achievement, acting through approaches to learning, shows those approaches as a dynamic construct that varies in line with experiences of the teaching-learning environment, and so influences achievement.