IMHO, for sharing printed material, a photocopy enlargement works best and
easiest, transferred onto an overhead transparency film. But if you insist
on scanning...
Scan it in at a fairly high resolution, say 600 dpi or more, and store it
as a TIF files, for example. (Don't store it with JPEG at this stage,
since that encoding method compromises between accuracy and disk space
requirements, tossing out some information to save space.)
Then you can load the TIF file into a viewer and Resize it without much
loss of resolution. One such software is Lview Pro (shareware) available
at many places on the Internet (just search for the name "Lview"). With it
you can do some pretty powerful editing of the colors, contrast, balance,
etc., and do some basic image editing like cropping, sharpening, blurring,
and resizing. It also allows you to Save As another format that might be
more convenient (e.g., GIF, JPEG, BMP, etc.). You can also set up "slide
shows" of images to help you in your presentation of several images in
class. (It almost sounds like I own stock in Lview, heh? :)
Hope this helps!
John
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