With respect to some concepts expressed here, I would like to add that if ppt is used primarily to graph concepts rather than to repeat texts, the teacher can constantly improvise and emphasize when he understands that it corresponds. In this way, the classes never become boring and the concepts exposition enjoy a graph that the teacher could never put on the board. For this reason the use of ppt has many advantages over other methods.
<span>"Old Ironsides" is the story of the oldest warship afloat in the world, the venerable frigate USS Constitution, the author is David Fitz-Enz</span>
