We are developing some e-learning materials and I am having discussions regarding a fixed height "wrapper".  I strongly disagree with the idea of fixed height, it goes against so many UX principles.  I have raised the usual points but am always countered with the argument that "it only applies to web site".  Does anyone have any links to articles relating to this topic? I am looking for specifically e-learning information or guidelines, but  generic web guidelines would also help.    

I am happy to be proved wrong if evidence points towards fixed layout been of benefit in the context of e-learning.