I'm not sure what you mean by a "preview option". The website sets the parameters for the "one free download" preview of a product and allows four sample images of other products, I believe...
I left teaching a few years back. The stuff I'm posting here was created about 10 years ago, though I've been re-formatting, editing, and adding to each set in order to sell on this site. I had originally created the worksheets to complement a specific classroom textbook, but I'm trying to make them usable as independent handouts. When I made these for my history classes, I'd usually spend a couple of days to create, but they were more bare-bones than what I'm posting now (no pictures, no "facts" portion).
Hope they help. Let me know if you have any comments, suggestions, etc.
March 27, 2013