Why Dr. Mahathir insisted on using English for
math and science?

This is because the whole world uses the language
as an information and/or technology language.
How dangerous it will be if we try to use Bahasa,
especially in school. See example below.

hardware = barangkeras software = baranglembut
joystick = batang gembira plug and play = cucuk
dan main port = lubang server = pelayan client =
pelanggan

Try to translate this:
ENGLISH :
That server gives a plug and play service to the
clients using either hardware or software joystick.
The joystick goes into the port of the client

Now in BAHASA:
Pelayan itu memberi pelanggannya layanan cucuk
dan main dengan menggunakan batang gembira
jenis keras atau lembut. Batang gembira itu
dimasukkan ke dalam lubang pelanggan.

Now You Know.......