Above is a numbered example of the same
You can follow this link and print off the two images as a single sheet of paper (or print separately, of course, and then run them through a copier to make it two-sided) and practice folding it as a quarto yourself. When you're done, you can try folding it into a tiny little pressman's cap, following the instructions that appear in this lovely piece, "The Newspaper Man is Defunct," from The Cape Cod today.
By the way, my syllabus is now done(ish) and can be found online in pdf form.
Correction: The spelling of recto has been changed to reflect its actual spelling. Oops.
Correction 2: I have corrected my usage of "news sheet" to reflect the more accurate term "newsbook" throughout the post. See the comments below for an explanation of the difference between the two!