THE SOCIO-PEDAGOGICAL EXPERIENCE OF V.P. KASHCHENKO IN THE “SANATORIUM-SCHOOL" SOCIAL INSTITUTE. Educ-21st-Century [Internet]. 2023 Jun. 23 [cited 2026 Mar. 11];5(1):196-205. Available from: https://journals.ysu.am/Educ-21st-Century/article/view/10515