This study aims at: (1) describing the implementation of international English curriculum, (2) describing the problems encountered in implementing international English curriculum, (3) exploring the teachers’ solution toward problems encountered in implementing international English curriculum, and (4) exploring the effects of the teaching on students’ achievement.
This study applies a case study method which had been carried out at SMP Tazkia International Islamic Boarding School (IIBS) Malang in the second semester of the academic year of 2016/2017. The data were collected through document analysis, observation, interview, and questionnaire. The data were, then, analyzed through interactive method.
The findings of this study reveal that first, the implementation of Cambridge curriculum in Tazkia has made English as the main language to communicate not only in classroom, but also in daily life. Additionally, the appropriate combinations of teaching technique, class activities, learning material, and media supported the teaching-learning process. Second, the problem encountered related to the absence of language laboratory as one of the requirements of the implementation of Cambridge curriculum to teach English. The other problems were related to the way of students’ thinking which was difficult to solve the problems given during the teaching and learning process, lack of English book in the library, and the absence of language laboratory. Third, to overcome the problems related the students’ difficulties in solving the problem, the teachers guided students in every process of learning. To maintain the lack of English book in the library, the school initiated by providing Wi-Fi connection, so that students could access other information from the internet. The absence of language laboratory was minimized by using speaker while listening practices. Fourth, related to students’ achievement, the researcher found out that most students achieved the passing grade. Only some of them still got under the passing grade. In regard to the students’ achievements, it is interestingly found that the implementation of Cambridge curriculum brings positive effect on the students who have high motivation and confidence to develop their skill.
Considering the result of this study, the implementation of Cambridge curriculum at SMP Tazkia International Islamic Boarding School (IIBS) Malang gave positive effects on the students’ achievements, so that it could be an alternative way of teaching English in other schools.

Keywords: Cambridge curriculum, TEFL, case study