This is the first in a series of six kits that the U.S. Postal Service (USPS)is publishing to help teach through stamps the history of the 20th century and the people, places, and events that have shaped this nation during the past 100 years. Each kit is designed as a complete and independent unit. This kit, covering the decade of the 1950s, contains: (1) Welcome letter from the USPS; (2) Ten Teacher's Lesson Cards; (3) One "Resource Guide"; (4) Thirty "Topic Cards"; (5) Ballot (with return envelope); (6) Student Magazine; (7) Poster; (8) Sticker Sheet; (9) Teacher's Feedback card. Kits are distributed in a kit storage box, with multiple copies of some materials. On the basis of the ballots, the USPS intends to issue a limited edition of 15 commemorative stamps celebrating the 20th century. (EH)