The National Libary of Virtual Manipulatives was created to supply teachers with interactive mathematics manipulatives. It is available free of charge on the web. Here is a description of their site taken from their about page:
"The National Library of Virtual Manipulatives (NLVM) is an NSF supported project that began in 1999 to develop a library of uniquely interactive, web-based virtual manipulatives or concept tutorials, mostly in the form of Java applets, for mathematics instruction (K-12 emphasis). The project includes dissemination and extensive internal and external evaluation."
This site can be used on an interactive whiteboard. Links to individual activities can be incorporated into smart notebook lessons as well. Faculty members can provide links to individual activities on their website for students to access at home.