PIRKO, Maryna V. ACTUAL ASPECTS OF RESEARCHES OF LEARNING TOOLS QUALITY DEFINITION PROBLEMS OF SECONDARY SCHOOL IN UKRAINE. Information Technologies and Learning Tools, [S. l.], v. 19, n. 5, 2011. DOI: 10.33407/itlt.v19i5.357. Disponível em: https://journal.iitta.gov.ua/index.php/itlt/article/view/357. Acesso em: 15 may. 2026.