The authors raise the problem of the readiness of a modern teacher for expanding interaction and communication with children in a sociocultural educational environment. The essence of pedagogical communication is revealed in the context of a dialogical approach. The development of the teacher's relationship with children in the educational environment is viewed as a complex dialectical process and identifies a number of criteria for its study: the purpose, motive, content, ways, mediators and meanings of interaction, forms of organization. The authors study the main problem of dialogue (interpretation, mutual understanding) and characterize the language as a communication space, and speech as the main "tool" of mutual understanding. The concepts of promoting, co-creation, and socio-cultural experience are revealed in their interrelation from the standpoint of a dialogical approach. The paper substantiates the vector of the transition from promotion to co-creation, aimed at amplifying the child's social and cultural experience, taking into account age opportunities, individual characteristics and the educational request of the family. The paper includes the results of the questionnaire survey of 1230 teachers from six regions of the Russian Federation, who have different teaching experience. The authors make a significant conclusion that the basis for a modern teacher's preparedness for dialogue is the ability to model a sociocultural educational environment that flexibly combines the external and internal space of interpersonal communication.