In November 2007 a joint ATM/MA team began working together to consider how ICT can be used to support the teaching and learning of topics that are considered to be "hard to teach" in secondary mathematics, within a project that complements that of the Secondary National Strategy. In the best subject association spirit, it was decided to advertise a call for "successful" ICT-based teaching approaches to the teacher community via the ATM, MA and NCETM websites, targeted e-mails and advertisements in the "TES". All the teachers met at a one day conference to present their individual case study and participate in discussions to consider more deeply the pedagogic benefits of their ICT use in relation to the "hard-to-teach" topics, and the best ways to disseminate this to other teachers. The resulting extended case studies will be published on the BECTA, and the subject association websites. Three of the studies have been filmed for a Teachers TV programme about the project "Hard to teach: secondary maths using ICT", and they can be viewed from the website. One of the teachers whose lesson was filmed was the author and in this article she describes her lesson in more detail. (Contains 6 notes.)