We have installed MathJax on www.math.ias.edu. http://www.mathjax.org/
MathJax allows you to display mathematics on a webpage using LaTeX code.
To include MathJax on your School website, include the following in
your html.
<script type="text/javascript" src="/MathJax/MathJax.js"><script>
This should go in the <head> section of your file.
Here are some example pages, one in drupal (our content management
system) the other in plain html.
http://www.math.ias.edu/mathjaxtest.html
http://www.math.ias.edu/mathjaxtest