AMAO-ADELEKE, Lukmon Adesile. Development and Validation of Economics Instructional Package (EcoIPac) for Learning Difficult Economics Topics in Senior Secondary Schools Lagos State, Nigeria. Journal of Innovation in Educational Assessment, Nigeria, v. 8, n. 1, p. 129–145, 2026. DOI: 10.66545/awcz6f91. Disponível em: https://journal.iaiiea.org/index.php/jiea/article/view/53. Acesso em: 29 may. 2026.