She is jointly appointed at the Faculty of Education and Department of Mathematics and Statistics. She received a PhD degree in mathematics in 1994. Her research interests include cognitive and historical developments of mathematical knowledge, challenge and mathematical giftedness, mathematical paradoxes, intuitive and rigorous mathematical logic, the role of technology in assisting mathematical thinking, interconnectedness and unity of mathematical knowledge, teachers' use and interpretation of mathematical problems. Her work had been published in more than twenty refereed papers and book chapters as well as presented at international conferences.