Based on a survey of junior college and polytechnic students in Singapore, this article argues that there is a gender gap concerning sustainable interest in science. In Singapore, both male and female students perform well in science subjects in the high school leaving examination, but by the time they begin their course of studies in the junior colleges and polytechnics, the female students do not retain interest in science. The relationship between class as well as parental educational background and interest (...) in science is not very strong. The disadvantages set by the class background are to some extent mitigated by the school system, which takes a meritocratic and thus somewhat performance-based egalitarian approach. Recommendations are made to help motivate female students to take an interest in science such as presentation of the role models of female scientists. However, the main target ought to be changes in the culture that promote more gender equality. (shrink)