Thus far, researchers have not investigated gender HCI issues in the context of end-user problem-solving software. Designers' ignorance of gender differences is particularly evident in studies showing software is unintentionally designed for males. We are investigating gender HCI issues using quantitative and qualitative empirical methods, using formative work to consider gender-conscious design features, implementing these features in our research prototype, and following up with summative work to evaluate effectiveness. AUTHOR KEYWORDS Gender, HCI Design, end-user engineering ACM CLASSIFICATION KEYWORDS