What a fascinating opportunity to listen to the topic of virtual manipulatives and the research on using them to enhance math instruction in the classroom! The presenters include Julie McCleod and Mary Jo Dondlinger.

Here are some of the slides they shared, which include some links to virtual manipulatives:

Neat slide that reflects the placement of virtual manipulative web sites (which use Flash BTW, so not sure if this would work well on iPad without Photon or Puffin browser):