There are many ways to incorporate Environmental Print into the Elementary Classroom. It's a great place for younger kids to start really digging into letters and sounds. It also presents opportunities to explore visual literacy.
For older kids, why not actually READ some of the writing that is found on food boxes, maps, and attraction brochures. Have students explore information found on familiar products.
The most important thing to remember is that YOUR environmental print is probably NOT the same as your students. This is especially true if you are teaching in a school with students from lower SES groups. It's not wrong. It's different. Have kids start collecting words, pictures, and logos from THEIR environment.
You can sort them. Make books using logos. Have students make word families using letters/words they find. Help them make the connection between the logo and the print form of a word. Have students make an Alphabet Book of environmental print.
Above all, don't forget to ASK THEM what they'd like to do with the print. Their ideas are often the best and will take them deeper in their literacy acquisition.