“…No other large-scale data have been gathered in this period to support an empirical comparison two years before and after the sovereignty handover. Besides including indicators of the English push factor particularly sensitive to the language policy change, these two projects are also pertinent to investigations of mathematics achievement (Beaton et al, 1996;Mullis, Martin, Fierros et al, 2000), self-concept (Mullis et al, 2001;Wang, 2004), and gender difference (Casey et al, 2001;Cheng & Seng, 2001;Ercikam et al, 2005;Fierros, 1999;Hosenfeld et al, 1999;Wester & Henriksson, 2000). Built on these important features of TIMSS and TIMSS-R, this study is designed to examine gender difference in the reciprocal relationship between student self-concept and mathematics achievement in the context of policy change during the sovereignty handover.…”