The educational set for the music lesson in Bulgarian school contain a printed edition of the textbook with the basic information intended for acquisition; a teacher's book which contains additional information on each topic that will be taught and a suggested plan for each lesson; a student's book with supplementary questions and tasks, suitable for both classroom work and homework; a set of CDs with the music for listening and the songs for singing; an electronic textbook, combining the content of the printed edition of the textbook, all musical works for listening and songs for performing, offered with soloists included, and - in a separate file - only the instrumental accompaniment suitable for performing simbeck, as well as many additional questions tasks, project ideas, a variety of illustrative material - videos, additional musical works, diagrams, tables, photos, poems. The availability of the electronic textbook from any device with internet makes it especially up to date in the conditions of distance learning imposed by the pandemic. In the present study, the tasks dedicated to the topic of the seasons from the printed and electronic textbooks of Prosveta publishing house [1-3] are subjected to theoretical analysis. The results of a pedagogical experiment confirmed those of the theoretical analysis, proving significantly higher success rate, higher potential for unconventional thinking and increased interest in music lessons in students of the 2nd, 3rd and 4th grade of general education school after the experimental education.