Schools can have an important effect on children's developing views of gender roles, and coursebooks form an important element of children's school experience. In 1996, we read an article by Anthea Fraser Gupta and Ameline Lee Su Yin that described gender bias in a 1980s primary school English coursebook series used in Singapore schools. We had carried out a previous study about gender and language (Ong, Zhuo & Jacobs 1997), and wondered whether more than ten years later, the present series, Primary English Thematic Series, or PETS for short, was an improvement on the past series, Primary English Programme or PEP? Both series were created by the CDIS (Curriculum Development Institute of Singapore), a branch of the Ministry of Education. In this article we describe how we set out to answer this question and what we found. [This article was published in "Awareness," v7 p47-53 2000.]