Improvisation of Instructional Materials and Its Effects on Students’ Academic Achievement in Resource-Constrained STEM Classrooms in Owerri Municipal Secondary School, Imo State. Journal of Advanced Multidisciplinary Studies (JAMS), [S. l.], v. 1, n. 2, p. Page 1037–1048, 2026. DOI: 10.68050/JAMS.2026.343. Disponível em: https://jamsjournal.org/JAMS/article/view/improvisation-of-instructional-materials-and-its-effects-on-stud. Acesso em: 21 sep. 2026.