In normal length courses you get OU produced material which usually include a lot of footnotes/additional info in appendixes/addendums etc - during one of the courses I did I came across a question in an assignment which was based on 3-5 lines of footnotes on one page of a 300+ page document - easy to miss. But not really applicable to TT courses as far as I can see.
If it wasn't for Google we'd all be in deep s...
Btw, have you tried posting the same question on Firstclass?