this special sesion will provide an everview of technology that enables the delivery of dynamic mathematics contents of the web. dynamic contents refer specifacally to web contents that react to clients's input. with some interactivity, this reactive behaviour can be customized and personalized. dynamic mathematics contents are such contents that the reactive behavio ur is provided by a mathematics engine. can be locally enabled in the client environment, or it can be a designated remote engine, or as a discoverable mathematical service. in this special session, we wiil discuss the implications of dynamic mathematics contents as described a nd how can it be delivered to the desktop computers or handheld computing devices. we begin with a mathematics activity example that is used in teaching. we highlight some of the key issues that teachers are faced with for this activity to be web-based with dynamic mathematics content. the web-based net-enabled environment will be re-visited, focusing on the role of XML and mathML, and web service. the session will conclude with a proposed cyber environment where teachers, researchers and students gather to share, leam, and explore. this community will leverage the mathematical service technology to enable dynamic mathematics content delivery.