Agriculture and Commerce.
This book would be a great resource for the classroom
It's pretty amazing that our society has reached the point where the effort necessary to extract oil from the ground, ship it to a refinery, turn it into plastic, shape it appropriately, truck it to the store, buy it and bring it home - is considered to be less effort than what it takes to just wash the spoon when you're done with it.
This one outlines the elegance of rotational cattle grazing vs. the square-peg/round-hole silliness of attempting to feed corn to cattle #agriculture
Planting Calendar based on your zip code! How cool!
Cost of land per square foot in Manhattan.
Agricutlure meat science resource