A study examined the effects of a new Hong Kong policy requiring Chinese as the language of instruction on secondary students' learning of science. Science achievement test scores at 100 secondary schools indicate that previous use of English to teach science may have hampered students' ability to grasp material due to the high-level thinking…

A Hong Kong program to train secondary school teachers in the use of English as the medium of classroom instruction is reported and discussed. The program provides assistance to teachers accustomed to using mixed code in the classroom and who must use English consistently, and helps English teachers understand how they can support teachers of…