GDB and debugging techniques

Hi,

I am training some new c coders (and other languages) on RH6.2 and FreeBSD.
I use GDB as the primary debugging tool. Are there better GPL ones out
there (or easier to learn)?

Anyone know of good sites that teach debugging? One problem I am finding is
that coders today do not know how to debug (this is an overgeneralization
but one I stand by :) I say this in the same breath that ASP is MS way of
keeping the VB coders employable. *DUCK*

Anyway, I am trying to set consistent and thorough debugging methods and
trying to train same. Anyone know of courses, classes, sites, etc to help?

Thanks,
Dave