KUMAR, Rajender. Comparative Study of the Effectiveness of three Instructional Systems for Teaching Information Technology to Secondary School Students. INDIAN EDUCATIONAL REVIEW, [S. l.], v. 43, n. 2, p. p. 56–71, 2007. Disponível em: http://ejournals.ncert.gov.in/index.php/ier/article/view/1715. Acesso em: 19 aug. 2025.