Victoria, OgunniranSurajudeen, Adewale2021-12-102021-12-102017-112616-1311https://uilspace.unilorin.edu.ng/handle/20.500.12484/7130enMother TonguePerformanceProficiencyFirst languageEnglish languageEffect of Mother Tongue on StudentsPerformance in Senior School Mathematics in Ogbomoso, NigeriaArticle