which kind of software program allows students to write, revise,move ,erase and print words

Answer 1

word processor

Answer 2

I would say Powerpoint, Openoffices, and some other softwares just type in " Keynote " and download if you have a Mac. Also try Google Docs Presentation.
And Sliderocket ( you can also add pics with it! )
Try 280 Slides
or Prezi!