International Bureau of Education (IBE) project coordinator Dakmara Ana Georgescu said the trend was happening in many other countries.
"It gives learners great opportunity to have access to materials internationally and access to the Internet," she said during a visit by Education Minister Hishammuddin Hussein to the institute which has been an integral part of Unesco (United Nations Educational, Scientific and Cultural Organisation).
The IBE's main mission is to function as an international centre for the development of contents and methods of education as well as teaching strategies through curriculum development.
Georgescu, who has been working on education projects in Afghanistan since 2002, said using English as the medium of instruction did not mean neglecting the national language.
"I think you can learn science in your mother tongue as well as I had learned science in my mother tongue which is Romanian.
"But it's also a great opportunity today to be able to have access to concepts and methodologies and to practices in English which is an international language especially in the areas of science and mathematics," she said.
She said choosing English to learn the subjects was a sign of opening to international development and providing immediate access for learners to the most relevant material of worldwide quality.
"While translation takes a lot of time and money, you have to think if it is useful. From what I know , many countries admire you and want to do the same," she said.
She said even in France, a country proud of its language, there had been recommendation for English to be taught in curriculum like mathematics and some aspects of the curriculum should be addressed in English.
