Each of the four annual issues of this publication explores a single topic through an interdisciplinary, multicultural approach. Science-based technologies and their impact on the lives of everyday citizens are the focus of this issue. Activities encourage students to think about the profound influence science-based technologies had on U.S. society during the middle decades of the 20th century. Each lesson identifies objective, needed materials, areas of subject integration, procedures for implementation and student worksheets. Lessons in this unit include: "The World of Tomorrow?"; "My World's Fair"; "A World Transformed"; and "Science-Based Materials in My Home." A take-home page is given in English and Spanish. The issue concludes with a list of resources. (MM)