I need help in selecting a low cost embedded Linux system that can better replace the Linksys WRT54GL that I currently use in teaching
What low cost embedded system product can I use to replace the Linksys WRT54GL that I currently use in teaching?
Why are you replacing? Do you need more performance? First you need to...
Why are you replacing? Do you need more performance? First you need to decide how much performance you need and then you can line up prospective replacements.
Also you need to decide if you are happy with an "out of the box" solution or if you want something more like a standard computer where you can log in, install software, etc. These days embedded systems are strong enough to serve as multipurpose servers in a small office environment.
When I asked myself this question I ended up buying a Soekris 5500. It was not the cheapest thing out there but its flexibility meant that I could implement my system as I wanted with no compromises.
Instead of a direct answer I would say that you should enumerate your requirements in as detailed a manner as possible, when looking over your requirements as a whole, a solution may become obvious.