Adopting a new repertoire is one of the most important stages in working with the choir. Therefore, it is essential to apply elaborated principles and methods when learning to sing a new composition with a children's choir. Before starting work on adopting a new repertoire, it is necessary to select compositions of appropriate quality. It is essential to choose a good repertoire according to elaborated criteria, and the possibilities of the choir, and it is also important when deciding where the repertoire will be performed. The next thing that is very important when learning to sing is the methods by which one learns to sing. There are various methods of learning new compositions, but they can usually be divided into three groups: the method of learning songs by ear, learning by notes, or combining the two methods. When the method that is most effective for a particular choir is chosen, it starts with learning to sing new compositions. When learning to sing a new repertoire, the choirmaster must plan how the rehearsal will look and fulfill his goals and tasks. When teaching, it is very important to have developed pedagogical and musical competencies that will lead to the successful completion of tasks. It is necessary to motivate the children and clarify certain parts of the composition that are not clear. It is also necessary to create a composition in sections, section by section, until everyone has learned the rhythmic-tonal structure, their articulation, and other performance characteristics. In the end, finesse and dynamics are worked out to make the interpretation as good as possible.