A teaching tool that is exciting a lot of interest is Prezi, flexible ,interactive and with multiple features. If people are using it share with us. For an introduction go to Paul Hill's very effective Prezi presentation. He shows how zoom features can really focus attention on detail.  Some blog comments quote eye strain as well but many teachers are responding positively. Harnessing what this tool and many others can offer to engage learners is the amazing sometimes daunting challenge. It will transform the way we help kids learn. Soon.