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Grade 4

What Makes Vehicles Safer?

From the Series Engineering Keeps Us Safe

If you pay attention to the news, you've probably seen some scary headlines: car and plane crashes, trains going off the tracks, and more. But the truth is, these kinds of accidents are rare… Read More →

  • Lexile: 810
  • ATOS: 5.0
  • Dewey: 629.04028'9

What Protects Us During Natural Disasters?

From the Series Engineering Keeps Us Safe

If you pay attention to the news, you've probably seen some scary headlines: an entire town destroyed by a tornado, floodwaters up to house roofs, and more. But the truth is, these kinds of… Read More →

  • Lexile: 850
  • ATOS: 5.3
  • Dewey: 363.34

What's Great about Alabama?

From the Series Our Great States

What's so great about Alabama? Find out the top ten sites to see or things to do in the Yellowhammer State! Explore Alabama's warm ocean coast, museums, and rich history. The Alabama by Map… Read More →

  • Lexile: 690
  • ATOS: 4.4
  • Dewey: 976.1

What's Great about Alaska?

From the Series Our Great States

What's so great about Alaska? Find out the top ten sites to see or things to do in the Last Frontier! We'll explore Alaska's fun-filled parks, fascinating fairs, vast wilderness, and exciting… Read More →

  • Lexile: 770
  • ATOS: 4.5
  • Dewey: 979.8

What's Great about Arizona?

From the Series Our Great States

What's so great about Arizona? Find out the top ten sites to see or things to do in the Grand Canyon State! We'll explore Arizona's vibrant cities, stunning rock formations, exciting rodeos… Read More →

  • Lexile: 760
  • ATOS: 4.7
  • Dewey: 979.1

What's Great about Arkansas?

From the Series Our Great States

What's so great about Arkansas? Find out the top ten sites to see or things to do in the Natural State! Explore Arkansas's mountains, forests, big cities, and rich history. The Arkansas by… Read More →

  • Lexile: 620
  • ATOS: 4.1
  • Dewey: 976.7

What's Great about California?

From the Series Our Great States

What's so great about California? Find out the top ten sites to see or things to do in the Golden State! Explore California's beaches, mountains, film studios, and colorful history. The… Read More →

  • Lexile: 720
  • ATOS: 4.5
  • Dewey: 979.4

What's Great about Colorado?

From the Series Our Great States

What's so great about Colorado? Find out the top ten sites to see or things to do in the Centennial State! Explore Colorado's snowy mountain peaks, wild rivers, and rich history. The Colorado… Read More →

  • Lexile: 790
  • ATOS: 4.7
  • Dewey: 978.8

What's Great about Connecticut?

From the Series Our Great States

What's so great about Connecticut? Readers will build skills to identify and summarize the top ten sites to see or things to do in the Constitution State. We'll explore Connecticut's… Read More →

  • Lexile: 710
  • ATOS: 4.5
  • Dewey: 974.6

What's Great about Delaware?

From the Series Our Great States

What's so great about Delaware? Find out the top ten sites to see or things to do in the First State! We'll explore Delaware's popular beaches, exciting parks, bustling bike trails, and rich… Read More →

  • Lexile: 760
  • ATOS: 4.6
  • Dewey: 975.1

What's Great about Florida?

From the Series Our Great States

What's so great about Florida? Find out the top ten sites to see or things to do in the Sunshine State! Explore Florida's endless beaches, thrilling theme parks, and stirring history. The… Read More →

  • Lexile: 700
  • ATOS: 4.4
  • Dewey: 975.9

What's Great about Georgia?

From the Series Our Great States

What's so great about Georgia? Find out the top ten sites to see or things to do in the Peach State! Explore Georgia's stunning scenery, buzzing cities, and exciting history. The Georgia by… Read More →

  • Lexile: 700
  • ATOS: 4.5
  • Dewey: 975.8

What's Great about Hawaii?

From the Series Our Great States

What's so great about Hawaii? Find out the top ten sites to see or things to do in the Aloha State! We'll explore Hawaii's popular beaches, whale-watching adventures, gorgeous parks, and… Read More →

  • Lexile: 740
  • ATOS: 4.6
  • Dewey: 919.6904'42

What's Great about Idaho?

From the Series Our Great States

What's so great about Idaho? Find out the top ten sites to see or things to do in the Gem State! We'll explore Idaho's famous parks, wide open spaces, relaxing hot springs, and stirring… Read More →

  • Lexile: 780
  • ATOS: 4.6
  • Dewey: 979.6

What's Great about Illinois?

From the Series Our Great States

What's so great about Illinois? Find out the top ten sites to see or things to do in the Land of Lincoln! We'll explore Illinois's lively cities, historic parks, fun-filled museums, and… Read More →

  • Lexile: 730
  • ATOS: 4.6
  • Dewey: 977.3

What's Great about Indiana?

From the Series Our Great States

What's so great about Indiana? Find out the top ten sites to see or things to do in the Hoosier State! We'll explore Indiana's fascinating caves, popular parks, exciting museums, and rich… Read More →

  • Lexile: 770
  • ATOS: 4.6
  • Dewey: 977.2

What's Great about Iowa?

From the Series Our Great States

What's so great about Iowa? Find out the top ten sites to see or things to do in the Hawkeye State! We'll explore Iowa's refreshing lakes, friendly farms, bustling cities, and rich history… Read More →

  • Lexile: 750
  • ATOS: 4.6
  • Dewey: 977.7

What's Great about Kansas?

From the Series Our Great States

What's so great about Kansas? Find out the top ten sites to see or things to do in the Sunflower State! We'll explore Kansas's exciting museums, outdoor adventures, and fascinating history… Read More →

  • Lexile: 610
  • ATOS: 4.0
  • Dewey: 978.1

What's Great about Kentucky?

From the Series Our Great States

What's so great about Kentucky? Find out the top ten sites to see or things to do in the Bluegrass State! We'll explore Kentucky's fascinating caves, popular parks, exciting museums and… Read More →

  • Lexile: 780
  • ATOS: 4.7
  • Dewey: 976.9

What's Great about Louisiana?

From the Series Our Great States

What's so great about Louisiana? Find out the top ten sites to see or things to do in the Pelican State! We'll explore Louisiana's festive cities, famous swamps, unique wildlife, and vivid… Read More →

  • Lexile: 670
  • ATOS: 4.4
  • Dewey: 976.3

What's Great about Maine?

From the Series Our Great States

What's so great about Maine? Readers will build skills to identify and summarize the top ten sites to see or things to do in the Pine Tree State. We'll explore Maine's outdoor adventures… Read More →

  • Lexile: 740
  • ATOS: 4.6
  • Dewey: 974.1

What's Great about Maryland?

From the Series Our Great States

What's so great about Maryland? Find out the top ten sites to see or things to do in the Old Line State! We'll explore Maryland's popular seaside, exciting museums, beautiful state parks, and… Read More →

  • Lexile: 690
  • ATOS: 4.3
  • Dewey: 975.2

What's Great about Massachusetts?

From the Series Our Great States

What's so great about Massachusetts? Find out the top ten sites to see or things to do in the Bay State! Explore Massachusetts's beautiful beaches, bustling harbors, scenic trails, and rich… Read More →

  • Lexile: 790
  • ATOS: 5.0
  • Dewey: 974.4

What's Great about Michigan?

From the Series Our Great States

What's so great about Michigan? Find out the top ten sites to see or things to do in the Great Lake State! We'll explore Michigan's popular lakes, gorgeous parks, exciting cities, and fun… Read More →

  • Lexile: 790
  • ATOS: 4.7
  • Dewey: 977.4