U. Silas, N., Faustin, D.H., Marien, D.N. and Paul, D.M.J. 2018. Identification of possible strategies for implementing PBL at INES-Ruhengeri: A preliminary study. International Journal of Social Sciences and Humanities Invention. 5, 6 (Jun. 2018), 4801–4807. DOI:https://doi.org/10.18535/ijsshi/v5i6.07.