To make the students away from my class understand what the teaching materials on computer tell them, I have to make a demo video by which I can figuratively show them what they can learn.
at my job we use Jing and Captivate... http://www.techsmith.com/Jing/?gclid=CJ-O4seeiaUCFVVi2godqTarNQ http://tryit.adobe.com/us/captivate5/?sdid=EQFQM