Effect of Mother's Tongue Interference With the Teaching of Biology a Case Study of Senior Secondary Schools in Ondo West Local Government Area of Ondo State

The primary aim of the study was to examine the effect of mother 's tongue interference with the teaching of Biology a case study of Senior Secondary Schools in Ondo West Local Government Area in Ondo State. Four (4) research questions were raised to guidethe study. A descriptive survey research design was used for the study. The population of the study was 25508 secondary school students in Ondo West Local Government Area of Ondo State. The sample size for the study consisted of one hundred (100) students.Proportionate random sampling technique was used. Questionnaire was the instrument used for data collection. The instrument was validated and the data were analyzed using the arithmetic mean based on the stated research questions. Findings showed that the research revealed that; mother 's tongues interfere with the teaching of Biology in Senior Secondary schools and it was concluded that the prevalent use of mother tongue adversely influenced the teaching of Biology. It was recomnended that; students of public secondary schools should be discouraged from conversing in mother tongues;moreover, stringent language policies that are feasible should be developed. Teachersshould come up with teaching mnethods that are interactive to ensure that students are given an opportunity to interact with each other in English so that students can have good communication skills. Schools should revamp their debating clubs, they should reward the winning teanns so that they can nurture a competitive environmnent that will propagate the use of Ernglish and the Nigerian Government should address the implementation of the National Policy on Education in the part of language of instruction in early childhood settings more seriously.