Have you checked into the resources listed below targeted at education?  Each of the following is designed for use by educators, often in the classroom, and includes applications useful in that environment.  The first two are Live CD's, so you could try them out on your own machine to see how they work, what software is included, etc...  This should help in terms of covering the topic well.  Also, some of these sites have additional documents you may find helpful to incorporate into your presentation.
  1. FreeDuc, This (high-school) classroom-focused CD is prepared by a French group (Ofset, Organization For Software in Education and Teaching) dedicated to improving the use of technology in classrooms.
    There is an English version of the manual at (http://ofset.sourceforge.net/freeduc/book/en/book_1.html) with some good information on numerous applications for education, all GPL-free
  2. Check the OSEF (Open Source Educational Foundation) at (http://www.osef.org/) and their Knoppix4Kids CD, it's great if your target is the K-12 audience, although it hasn't been updated for about 18 months.
    They also have a lot of additional information that you may find useful in your presentation.
    In particular, a few links down at (http://casestudy.seul.org/cgi-bin/caseview0.pl) there is a list of case studies of Linux in schools.
    Note: The link to the ISO is broken, but this link (http://www.swfo.arizona.edu/~hmcgregor/knoppix-kids-v2.iso) works, as does this one(ftp://seul.org/pub/seul/knoppix-kids-v2.iso).  I have a copy if you need it as well.
  3. Check the SEUL/Edu Educational software list at (http://richtech.ca/seul/)
  4. Another CD for education, this time focused on Science, is the KnoSciences CD at (http://gistlabs.homelinux.net/Knosciences/index.html), this one is also developed by the French, and shares some characteristics with the FreeDuc CD.
  5. K12LTSP (http://k12ltsp.org/) is another K-12 focused group, they are mostly creating a distribution (customized Fedora) designed to set up a school network as a terminal server with diskless workstations.
Hope these links help.  There's a lot of information behind some of them, so you should have more than enough to fill out your presentation.

der.hans wrote: 
Am 30. Jan, 2005 schwätzte Bart Garst so:

  
On Sun, 2005-01-30 at 14:10, der.hans wrote:
...
    
I need some good educational software to present, though. Keduca looks
interesting, but it's not something I use.

gcompris was recently suggested to me in a conversation about educational
software.
      
Maxima (xmaxima for a gui) maybe?


I know my calculus classes would be a lot harder without it.
    

There was a /. thread about math programs. maxima was one that got
mentioned.

Here are some other things I peeled out of that thread.

http://www.quantian.org/
octave - The GNU Octave language for numerical computations (2.1 branch)
r-base - GNU R statistical computing language and environment
siptoolbox - Scilab image processing toolbox (SIP)
euler - an interactive mathematical program
gerris - The Gerris Flow Solver
maxima - A fairly complete computer algebra system-- base system
math.com
pari-gp - PARI/GP Computer Algebra System binaries
gap - Groups, Algorithms and Programming computer algebra system
yacas - Computer Algebra System
quantlib-examples - Quantitative Finance Library -- example binaries
ginac-tools - Some tools for the GiNaC framework

I've never used any of them.

ciao,

der.hans