Note: external links open in separate windows.
This site runs on
We use Apache -- the
most popular web server.
Algebra.Com is well secured.
This site uses a combination of HTML,
I use object-oriented features of Perl 5. I love perl! I use MySQL as the database backend.
Algebra.Com uses a content management system that I wrote
myself. It is geared towards online teaching of math. To that end, it
does two things: first, formulae that are typed by tutors or created by solvers, are displayed in
proper mathematical form, like this: . See about
formula rendering. Second, lessons and solvers are stored in
the database (even though they "appear" to be HTML files to the reader).
Since solvers have an abstract interface, solvers can be invoked by
tutors when they write solutions to student problems. For instance,
linear systems or quadratic equations have pluggable solvers. That
improves tutor productivity and reduces the amount of drudgery. I have
a relatively sophisticated
expression simplifier and
solver with work shown.
Some sample code (all very dated):
Because this site uses perl, it works very fast. It can easily serve about 50
complex dynamic pages per second (see our stats).
It is also
capable of plotting graphs, pie
charts, artificial intelligence and sound,
a fully cross-linked dictionary,
and a lot of other things that will be difficult to accomplish with
less powerful languages, such as ASP.