Mwansa Mbulo and Penda Annie 2022. Theoretical and conceptual frame work for factors that lead to poor performance for learners with hearing impairment in the national examination at grade nine (9): A case of ChilesheChepela Special School and Musakanya Special Unit in Kasama and Mpika district. International Journal of Research in Informative Science Application & Techniques (IJRISAT). 2, 3 (Feb. 2022), 11–22. DOI:https://doi.org/10.46828/ijrisat.v2i3.29.