Definition: Environmental Print is the print of everyday life: The symbols, signs, numbers, and colors found in McDonald's, Wal-Mart, Exxon, Pizza Hut, 7-Up, and on websites, for instance. They offer excellent entry points for young children to begin to learn to read, write, and do math.
Resources for environmental print are: Books, billboards, calendars, catalogs, comics, containers, coupons, flyers, greeting cards, grocery stores, journals, labels, magazines, menus, newspapers, office supply packaging, posters, recipes, road signs, snack bags, telephone books, and websites.
The reasons to use environmental print: It is everywhere and, because it is, it is a natural starting point to teach young children to read, write, and do math. Children have a concrete connection to everyday print. They "read" it within the context of their everyday experiences--their interests and backgrounds. It bridges the gap between the functional print of school and the print outside. It doesn't cost a lot of money to use.
(this information was from sharonmacdonald.com)