and the purpose of the study was to conduct a meta-analysis on studies carried out on the role of teaching models in students’ academic achievement. A total of 30 theses were indentified from among 851 graduate program research theses available at the Teaching Research Institute of the Ministry of Education in Ardabil, and 513 papers obtained from the websites. All research studies were conducted before Jan 10, 2011, and included the research projects and/or student theses focusing on the role of teaching models in students’ academic achievement. Among these works, twenty one had 70 percent of the features for entering the meta-analysis, so they were considered for further examination. The results of the studies and impact factors combination showed that the efficacy order of models had been as follows: Scientific Inquiry Model, Organized Inquiry Model, Mnemonic Model, Cooperative Learning, Synectics Model, Inductive Thinking Model, Advance Organizer Model, Attaining Concept, and Social Learning Model.