Subject. The subject of the study is modular technologies and criteria for evaluating aesthetic restorations performed by the third-year students in classes. Objective. The aim of the study is to assess application of modular technologies and criteria for evaluating aesthetic restorations of first molars in the upper and lower jaws during treatment of caries lesions performed by the third-year students. Methodology. The study was conducted by the Department of Therapeutic Dentistry and Propaedeutic of Dental Diseases, Ural State Medical University of the Ministry of Health of the Russian Federation. The study involved 64 third-year dental students. This paper presents teacher assessment of aesthetic restorations performed for one hundred first phantom molars filled by the third-year students. The restorations were evaluated using criteria of Dental Association of Russia and FDI which ensure a comprehensive evaluation of quality of direct dental composite restorations. Treating carious lesions in a practical class, the third-year students performed sequential and volumetric restorations of the anatomy of molars of the upper and lower jaws, evaluated patterns of grooves of the occlusive surface and tooth morphology by the visual and instrumental method using a periodontal probe and mirror. Conclusion. Developing knowledge, competence, skills and experience in aesthetic restorations, modeling the relief of the occlusive surface of teeth, detailing, step-by-step overviews allow students to sequentially and stepwise make ‘dimensional” outlines of teeth, shape the relief of chewing surfaces (grooves of the first, second and third orders, ridges and cusps) in consideration of their anatomical topographical characteristics and the systematic approach to restoration of dental crowns. Application of criteria for evaluating aesthetic restorations prepared by students in classes is reasonable as it makes the filling process and restoration of the natural molar relief in consideration of its morphological and functional parameters more efficient. This study presents the practical experience directly connected with tasks and requirements related both to a third-year student and a future dental practitioner.