By Jefferson Graham, USA TODAY
SAN FRANCISCO - "What are you doing?"
That question is the rocket fuel for Twitter - a hot social-network service that lets you tell people what you are up to at any given moment of the day - via cellphone, instant messenger, or the Web. Never heard of it, you say?
Helen Barrett makes suggests that the major problem with ePortfolios is that they are implemented without TPCK. Barrett suggests that there is too much emphasis on data collection and not on student learning.