Not sure where to start this so I picked the most used forum.
I came across something rather unique found in an real old classroom closet..... A pale green envelope with a two button string tie from the Association of American Railroads in Wash. DC containing fifty seven 8 1/2" X 11" B&W photos. A student introduction to railroading circa 1950+/-. Very basic but broad based information. From a Pennsy diesel shop, mid America ice platforms & cattle yards, hump yards etc. to SP Black Widows and cab-forwards hauling through California.
Anyone remember such a teaching tool?
I remember how we RR kids would always weave trains into any school project. tt