Curated OER
Zip Codes
Students discover how a zip code is used. In this zip code lesson, students use the parts of a zip code to find where a letter is going, then find the first number of zip codes based on geographic regions.
Other
United States Postal Service
As an independent agency of the government, the United States Postal Service homepage offers information on zip codes, address change, stamps, online billing, and variety of other topics.