Source: UNESCO, May 2011
Malaysia’s rankings (from 2003 to 2009) for the Trends in International Mathematics and Science Studies. The source is a 2011 UNESCO report (http://unesdoc.unesco.org/images/0019/001931/193184e.pdf). Emphasis added.
We can safely assume that UNESCO is a reliable and trusted source of education expertise because the Ministry of Education has signed an MOU for UNESCO to help review Malaysia’s education policy.