Hi, pal. And be very welcome to this Forum! I think your question could be rendered as the following: Is it very helpful to have English as a means of instructions in non-English speaking countries in order to develop their people's language skills?
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renan torres-riveromedium or means? I think means is more appropriate in this context.
Here is an article:
Why English should be the medium of instruction
by Bernardo Villegas
http://www.mb.com.ph/oped/villegas/2000/bv000526.asp 26 May 2