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Fixed height web pages and e-learning

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 sites". Does anyone have any links to articles relating to this topic? I am looking for specific 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.