Teaching Science in English is one of the most important changes made in the education policy in Malaysia recently. In order to understand the impact this language policy has on prospective teachers, this study was conducted to find out how pre-service teachers of science cope with the challenges of teaching through the medium of the English language during their teaching practicum. 154 trainees enrolled in the Bachelor of Education in Science program at a local university participated in this study. Data is drawn from survey questionnaires with the student teachers so as to examine the instructional strategies used to cope with language related problems while teaching Science. Based on the results of this study, the researchers discussed implications for professional development in teacher training programs.