The system of music education is directly attributed to arrangements that improve theoretical and working knowledge. Purpose of the article: the features of interactive methods that improve music literacy skills among students majoring in preschool education at teacher training universities, based on the Kodály method. Achievement of the set goal was possible as a result of involvement of 100 students and 55 preschoolers. Using the method of observation, the authors developed the following principles to improve the musical literacy of students: setting the voice with Erol Singer's Studio; vocal performance of songs using active movements; learning from national vocal art, as well as academic foreign compositions; application of the soliloquy principle using the Sing Sharp app. In this study, using the calculation of the coefficient of effectiveness, the level of knowledge of students after the training was established. It was found that voice production without the involvement of a musical instrument and vocal performance of songs using active movements were developed to a greater extent (at a high level), because interactive technology was involved, promoting the assimilation of knowledge (Erol Singer's Studio). Calculation of the knowledge efficiency of preschool children who were trained according to the developed principles showed that the greatest number of preschool children received a high level of knowledge, which is associated with their interest in learning. The paper's practical implications are attributed to the possibility of applying the developed education principles for musical literacy improvement based on interactive teaching methods and the Kodály method. Further studies might measure the effectiveness of the developed teaching principles for a broader age group of students, which will help to track the positive (negative) effects of the curriculum on musical literacy skills.