Level 1 - Acknowledgments

Theme Introduction: Onward and Upward

©CORBIS; ©Ron Kimball Photography; ©Adobe Image Library; ©Photodisc

Cover ©Ron Kimball Photography; p. iii ©Ron Kimball Photography; p.iv(a) ©Hulton Archive/Getty Images; p.iv(b) ©Jim Cummins/FPG International; p.iv(c) ©Huntington Library/SuperStock; p.3 ©CORBIS; p.5 ©Hulton Archive/Getty Images; p.6 ©Bettmann/CORBIS; p.9 ©Ron Kimball Photography; p.10 ©Neil Rabinowitz/CORBIS; p.12(a) ©Bettmann/CORBIS; p.12(b) ©Hulton Archive/Getty Images; p.13(a) Courtesy of Indianapolis Motor Speedway Corporation; p.13(b) ©Bettmann/ CORBIS; p.14 ©Leonard de Selva/CORBIS; p.15(a, b) ©Bettmann/CORBIS; p.16 ©Ron Kimball Photography; p.17(b) ©Underwood & Underwood/CORBIS; p.17(a) ©Ron Kimball Photography; p.18(a) ©Park Street; p.18(b) ©Joel W. Rogers/CORBIS; p.19(a,b) ©Ron Kimball Photography; p.21 ©Bettmann/CORBIS; p.22 ©Ron Kimball Photography.

Cover ©Hulton Archives/Getty Images; p.iii © Scott Polar Research Institute; pp.iv-1 ©Jan Tove Johanssons/Getty Images; p.3 © Scott Polar Research Institute; p.5 © Hulton Archives/Getty Images; p.6 ©Barry Rosenthal/Getty Images; p.9 ©Scott Polar Research Institute; p.11 ©Scott Polar Research Institute; p.12 Scott Polar Research Institute; p.13 Scott Polar Research Institute; p.15 ©Hulton Archives/Getty Images; p.17 Scott Polar Research Institute; p.18 Scott Polar Research Institute; p.19 ©Jan Tove Johanssons/Getty Images; p.20 Scott Polar Research Institute; pp.22-23 Scott Polar Research Institute. Additional photography by the Steck-Vaughn Collection.

©Mechanics: Robin Brandenburg; ©Crafts, Art: Joya Menashe; Additional photography from ©Photodisc and the Steck-Vaughn Collection.

Cover ©Duomo/CORBIS; p.iii ©Phil Schermeister/CORBIS; p.iv ©Bettmann/CORBIS; p.3 ©Steve Wilkings; p.4 ©Ales Fevzer/CORBIS; p.8 ©Richard Hamilton Smith/CORBIS; p.10 ©David Young-Wolff/PhotoEdit; p.15 ©Eric Pearle/FPG; p.18 ©Adam Pretty/AllSport; p.19 ©Duomo/ CORBIS; p.21 ©Duomo/CORBIS; p.22 ©Duomo/CORBIS; p.23 ©Mike Powell/AllSport. Additional photography by Comstock and PhotoDisc.

Cover ©Courtesy The Barnum Museum, Bridgeport, CT; Cover ©Courtesy of the Bridgeport Public Library; p.iv ©Photo Edit p.2 ©Courtesy The Barnum Museum; p.4 ©Courtesy of the Bridgeport Public Library; p.6 ©Courtesy of the Bridgeport Public Library; p.7 ©Courtesy The Barnum Museum; p.9 ©Courtesy of the Bridgeport Public Library; p.11 ©Courtesy The Barnum Museum; p.13 ©Francis G. Mayer/CORBIS; p.14 ©S. Michael Bisceglie/Animals Animals; p.16 ©Bettmann/CORBIS; p.18(a,b) ©Courtesy The Barnum Museum; p.23 ©Courtesy The Barnum Museum. Additional images by Steck-Vaughn Collection.

Level 2 - Acknowledgments

Theme Introduction: Count on Me

To Reach the Top cover ©Galen Rowell/CORBIS; Trash with Dash cover (dog) ©Photo by Mel Schockner; Cover (tires) ©Craig Aurness/CORBIS; Cover (paper) ©PhotoDisc, Inc..

Cover ©Galen Rowell/CORBIS; p.iii(a) ©Galen Rowell/CORBIS; p.iii(b) ©SuperStock, Inc.; p.iv ©Bettmann/CORBIS; p.9(b) ©SuperStock, Inc.; p.15 ©Don Mason/CORBIS Stock Market; p.17 ©Joel W. Rogers/CORBIS; p.19 ©Bettmann/CORBIS; p.21 ©AP/Wide World Photos; p.22 ©Brown Brothers; p.24 ©Hulton-Deutsch Collection/CORBIS; pp.30-31 ©John Terence Turner/FPG International; p.38 ©NASA. Additional photography by CORBIS, Corel Corporation, and PhotoDisc, Inc. Art: p.3 Gary Antonetti.

Cloze Activity Movie Clips ©Prelinger Archives and the Internet Archive (www.moviearchive.org).

Cover (dog) ©Photo by Mel Schockner; Cover (tires) ©Craig Aurness/CORBIS; Cover (paper) ©PhotoDisc, Inc.; p.i (background) ©Lynn Charles Foster; p.2 ©Craig Aurness/CORBIS; p.7 ©Alan Schein/CORBIS Stock Market; p.11 (foreground) ©Eyewire, Inc.; p.15, p.16 ©Solar Survival; pp.20-21 ©Martin Jones/CORBIS; p.24 ©Judy Reed; pp.25-26 ©Photos by Mel Schockner; pp.27-28 ©Lynn Charles Foster; p.30 ©Steve Vidler/SuperStock, Inc.; p.31 ©Connecticut Resources Recovery Authority; p.32 ©Spencer Grant/Photo Researchers, Inc.; pp.35-36 ©SL Steinman; pp.37-38 ©Ross Garcia, courtesy of Preserve Bottle Village Committee; p.39 ©Ted Krause. Additional photography by Comstock, Inc., CORBIS, and PhotoDisc, Inc. Cloze Activity Movie Clips ©Prelinger Archives and the Internet Archive (www.moviearchive.org).

The Fight for Right cover ©Bettmann/CORBIS; Tough Choices cover ©FPG/Getty Images.

Cover ©Bettmann/CORBIS; p.i ©Bettmann/ CORBIS; p.iv ©AP/Wide World Photos; p.4 ©John G. Moebes/CORBIS; p.6 ©AP/Wide World Photos; p.7 ©PictureQuest, Inc.; p.11 Bettmann/CORBIS; p.12 ©The Library of Congress/Photo Researchers, Inc.; p.14, pp.16-17 ©Bettmann/CORBIS; p.18, p.20 ©AP/Wide World Photos; p.24 ©Bettmann/CORBIS; p.26 ©AP/Wide World Photos; p.29 ©Bettmann/CORBIS; p.30, p.32, pp.34-35 ©AP/Wide World Photos; p.37 ©Bettmann/ CORBIS; p.38 ©Hulton Archive. Art: p.7 Elizabeth Hinshaw.

Cover ©FPG/Getty Images; pp.iv, 2, 3, 5, 7 ©Park Street Photography; p.9 ©David Young-Wolff/ PhotoEdit, Inc.; pp.10, 13 ©Park Street Photography; pp.14, 19 ©David Young-Wolff/PhotoEdit, Inc.; pp.22, 24 ©Park Street Photography; p.25 ©Mugshots/CORBIS Stock Market; pp.27, 28, 31 ©Park Street Photography; p.34 ©Nancy Sheehan/PhotoEdit, Inc.; p.36 ©Park Street Photography; p.37 ©Mary Kate Denny/PhotoEdit, Inc. Additional photography by CORBIS and PhotoDisc, Inc.

Level 3 - Acknowledgments

Theme Introduction: Just Connect

Teaming Up cover ©Mike Powell/Getty Images.

Cover ©Mike Powell/Getty Images; p.iv ©Brown Brothers; p.2 ©Archive Photos/PictureQuest; pp.4-5, 7 ©AP/Wide World Photos; pp.8-9 ©FPG International; p.9-10 ©Hulton Archive; p.12 ©Bettmann/ CORBIS; p.14 ©Brown Brothers; pp.18, 20 ©Royal Geographical Society; p.22, 24 ©Photos courtesy of The Seeing Eye; p.29 ©Michael Newman/PhotoEdit, Inc.; pp.31, 33 ©Bettmann/CORBIS; pp.34, 37-39 ©Brown Brothers. Additional photography by Artville. Art: p.16 Gary Antonetti.

p.iv ©Kazuyoshi Nomachi/Photo Researchers, Inc.; p.2 ©D. Cavagnaro/Visuals Unlimited, Inc.; p.6 ©Steve Callahan/Visuals Unlimited, Inc.; p.7 ©Bill Beatty/Visuals Unlimited, Inc.; p.8 ©Tim Williams; pp.15-16 ©Mary McAdam; p.17 ©Scott Camazine/Photo Researchers, Inc.; pp.21-22 ©Bill Ballard; pp.28-29 ©Tom McHugh/Photo Researchers, Inc.; p.30 ©Alvin Simmons; p.32 ©Shane Keyser; p.35 ©Frank Lane Picture Agency/CORBIS; p.36 ©Alison Wright/CORBIS; p.38 ©Macduff Everton/CORBIS. Additional photography by Comstock, Inc., CORBIS, MetaTools, PhotoDisc, Inc.

The Will to Survive cover ©Dave Martin AP/Wide World Photos; Seeing Eye to Eye cover (top row) ©PhotoDisc, Inc., (middle and bottom rows) ©SuperStock, Inc..

Cloze Activity Movie Clips ©Prelinger Archives and the Internet Archive (www.moviearchive.org).

Cover ©Dave Martin AP/Wide World Photos; p.iv ©Julie Habel/CORBIS; p.6 ©Reuters NewMedia Inc./ CORBIS; pp.10-11, 13 ©AP/Wide World Photos; p.19 ©Bettmann/CORBIS; pp.30, 34 ©AP/Wide World Photos; p.37 ©Courtesy NOAA. Additional photography by CORBIS and Cartesia. Art: p.3 Gary Antonetti.

Cover (top row) ©PhotoDisc, Inc., (middle and bottom rows) ©SuperStock, Inc.; p.iv ©Tim Fuller; p.3 ©Steve Lyne, Rex Interstock/Stock Connection/PictureQuest, Inc.; p.4 ©David Young-Wolff/PhotoEdit, Inc.; pp.7-8 ©SuperStock, Inc.; p.11 ©Sierra Studio; pp.14, 16-17, 21, 23 David Young-Wolff/Photo Edit, Inc.; p.26 ©SuperStock, Inc.; p.28 ©Geostock/ PhotoDisc, Inc./PictureQuest, Inc.; p.30 ©Tim Fuller; p.35 ©Jonathan Nourok/PhotoEdit, Inc.; p.37 ©David Young-Wolff/ PhotoEdit, Inc. Additional photography by CORBIS and Corel Corporation. Cloze Activity Movie Clips ©Prelinger Archives and the Internet Archive (www.moviearchive.org).

Level 4 - Acknowledgments

Theme Introduction: Take a Stand

A Teen's Guide to Working cover ©Chuck Savage/CORBIS Stock Market; The Moon and Beyond cover ©NASA.

Cloze Activity Movie Clips ©Prelinger Archives and the Internet Archive (www.moviearchive.org).

Cover ©Chuck Savage/CORBIS Stock Market; p.iv ©Chuck Savage/CORBIS Stock Market; p.7(top, center) ©Mary Kate Denny/PhotoEdit, Inc.; p.7(bottom) ©David Young Wolff/PhotoEdit, Inc.; p.10 ©SuperStock, Inc.; p.13 ©Chuck Savage/CORBIS Stock Market; p.16 ©SuperStock, Inc.; p.19 ©Jeff Greenberg/PhotoEdit, Inc.; p.24 ©Michael Newman/PhotoEdit, Inc.; p.30 ©Everett Collection; p.33 ©Sue Gregory; p.36 ©Mark Andersen/Rubberball Productions/PictureQuest, Inc.; p.39 ©Quarasan; p.42 ©LWA-Dann Tardif/CORBIS Stock Market; p.44-45 ©David Young Wolff/PhotoEdit, Inc.; p.49 ©Tony Freeman/PhotoEdit, Inc. Additional photography by CORBIS.

Cover ©NASA; pp.iii (background), p.iv ©NASA; p.2 ©Bettmann/CORBIS; pp.6-7, 11, 15, 18, 20-21, 23, 25, 27, 30, 33, 35, 36, 38, ©NASA; p.40 ©Roger Ressmeyer/CORBIS; pp.41, 45-47 ©NASA; p.50 ©Reuters NewMedia Inc./CORBIS; pp.56-60 ©NASA. Additional photography by CORBIS and Corel Corporation.

From Zeus to Aliens cover ©Darren Winter/CORBIS.

p.5 ©K.G. Murti/Visuals Unlimited, Inc.; p.10 ©Mark Burnett/Stock Boston, Inc./PictureQuest; p.12 ©Geo Musil/Visuals Unlimited, Inc.; p.15 ©Scott Barrow/International Stock; pp.17, 24 ©Bettmann/CORBIS; p.31 ©SuperStock, Inc.; p.40 ©Bob Daemmrich/Stock Boston, Inc./PictureQuest; p.47 ©Mark E. Gibson/Visuals Unlimited, Inc.; p.49 ©Joe Atlas/Artville; p.50 ©Rafael Macia/Photo Researchers, Inc.; p.55 ©Joseph Sohm/Visions of America, LLC/PictureQuest. Additional photography by CORBIS, MetaTools, and PhotoDisc, Inc. Cloze Activity Movie Clips ©Prelinger Archives and the Internet Archive (www.moviearchive.org).

Cover ©Darren Winter/CORBIS; p.iv ©Darren Winter/CORBIS; p.2 ©Mimmo Jodice/CORBIS; p.5 ©Digital Art/CORBIS; p.6 ©Sierra Studio; pp.8, 11, 13 ©Bettmann/CORBIS; pp.14, 16 ©Hulton Archive; p.24 ©Bettmann/CORBIS; p.27 ©Joseph Sohm/ChromoSohm, Inc./CORBIS; p.28 ©AP/Wide World Photos; p.32 ©Christopher Cormack/CORBIS; p.35 ©Pictor International/PictureQuest; p.36 ©Stockbyte/PictureQuest; p.40 ©Tim Fuller; p.53 ©CORBIS; p.55 ©Sierra Studio. Art: pp. 6,19, 55 Todd Dakins; pp. 42, 45, 47, 50 Jeff Shelly.