The objectives of this study are: 1) to describe and explore the implementation of CBI in Civics teaching and learning process; 2) to identify the extent of implementing CBI to promote English acquisition.

This research was conducted at the first grade students in Madrasah Ibtida’iyah International Class Program Nurul Ulum Bojonegoro in the first semester of 2014/2015 academic year precisely on Civics of Shafa class with 24 students categorized as an active students come from different social and economic  background. The method used in this study was a qualitative research in the form of case study. In collecting the data, the writer conducted interview, class observation, and document analysis.

The result of this study revealed two major findings which consist of 1) the description of the implementation of content-based Instruction in Civics’ teaching and learning in MI ICP NU Bojonegoro which consist of: the document used on implementing Content-based Instruction (Syllabus and Lesson Plan), Civics teaching and learning by using Content – Based Instruction and the other components supporting the implementation of Content-Based Instruction and; 2) the extent of implementing Content- Based Instruction in promoting English acquisition. The implementation of CBI in the first grade of Civics’ Class implemented well during the lesson but it has not supported by the teaching documents. Implementing CBI in the first grade students of Civics’ class drives the students motivated and used to speak in English because every day they listen, read, write and speak in English during the learning process. In Conclusion, the research findings provide a new paradigm that the implementation of CBI is very useful and helpful in the process of students’ English acquisition. By implementing CBI are believed to be responsible for successful of English acquisition and a significant determinant of ultimate success in language learning. Thus, in learning English as a foreign language. Good implementation of CBI is important as well.

Key words: CBI, Young learners, English Acquisition, Case study