The International Thames Test, or International Study of the Mathematics and Science Education Process, assesses the progress of mathematics and science in the fourth grade of elementary and third grade. One of the most important assessments that measures the quality of learners' learning in the world's educational systems. The International Association for 
Academic Evaluation, as a reflection of the educational goals of the educational system of different countries of the world, regularly in the Thames exams, provides reliable and quality information about the students' academic performance in mathematics and science. Educational policymakers around the world are accepted and noteworthy. These tests are designed to measure students' academic performance in mathematics and science. Participating in these tests helps countries to use the information obtained to improve the education system in the international community. The results of these surveys often lead to discussions about policies and recommendations to improve student performance. In the present article, while introducing the Thames test, we review and analyze the evaluation of Iranian students in different periods of this test.