Advertising lessons - Ad It Up Method. There's not a lot here for middle school, but there is a "show and tell" suggestion where students bring in CDs, movies, etc.
14 Wonderful Vintage Canadian Propaganda Posters
This Canadian Food Board poster from WWI discourages the hoarding of food and points out that fines and/or jail time are possible punishments. "Are you breaking the law? Patriotic Canadians will not hoard food.