The study focused on languages of education in Nigeria and extent of implementation in the (UBE) Schools in Ebonyi State. The study adopted a descriptive survey design. The population of the study constituted all the Universal Basic Education teachers in the 13 LGA of the State. A sample study of 555 respondents was selected using proportionate stratified random sampling technique which reflected teachers in the urban and the rural schools. The instrument used was questionnaire which was validated and trial tested for reliability and a value of 0.84 was obtained. Mean and standard deviation were used to answer the research questions while t- test was used to test the hypotheses at 0.05 alpha level of significant. Findings showed that languages in education were implemented to a low extent and that extent of materials that enhance languages’ effective implementation were made available to a low extent which were more experienced in schools in rural areas. It was recommended that teachers should embrace stipulations of the Government based on the National Policy on Education and that the government should embark on training and retraining of teachers on different languages in Nigerian Education and provide other resources for effective language implementation.

The study investigated the effects of utilising English as the primary teaching language on the academic development of Grade 4 (Gr4) learners, specifically focusing on the Life and Living (L&L) component of Natural Sciences (NS). Gr4 learners commonly transition to English as the Language of Learning and Teaching (LoLT), relegating native languages such as Sesotho to mere study subjects. This shift often results in comprehension and retention challenges, hindering students' academic achievements. By employing a quasi-experimental research design, the study used a purposefully selected sample of 80 Gr4 students from two primary schools. The control group (45 learners) received English instruction from Grade R to Grade 7, while the experimental group (35 learners) switched from Sesotho to English in Gr4. Both groups underwent pre-tests and post-tests, revealing statistically significant differences favouring the experimental group. These findings support the research hypothesis that introducing English as the LoLT as early as Grade R has a significant impact on learners' performance, particularly in NS. It is recommended that English be adopted as a medium of instruction for NS, as this better prepares students for future academic challenges.