Maths4All.ie, funded by SFI Discover, is a website designed for and with teachers. It contains activity plans, continuous professional development materials and video clips based on activities carried out in Irish primary and preschool classes. Plans are based on the draft specification of the forthcoming primary mathematics curriculum and Aistear and are suitable from preschool to third class. The website offers a video-based approach to continuous professional development and modules relating to mathematical tasks, talk and the use of play and picture books are available. Currently, we are working to extend the activity plans on offer to include the senior classes of primary school. We are also developing new professional development modules in response to a survey of teachers’ needs and preferred formats.