(Grade 5-7 Readability) Howler Monkeys (Grade 5-7 Readability) Hydropower (Grade 4-7 Readability) Japan Surrenders (Grade 5-7 Readability) Lightning Rods (Grade 6-8 Readability) NASA's New Frontier: JUNO (Grade 6-8 Readability) Nutrition (Grade 5-8 Readability) Parts of the Food Chain: Consumers (Grade 5-7 Readability) Patriotism - Wear Your Colors Proudly (Grade 5-7 Readability) Peace - Martin Luther King, Jr. The March on Washington The Marshall Plan The Marva Collins Story: "A Brilliant Child Inside Every Student" The Mauryan Dynasty The Maya Civilization, Part 1 The Maya Civilization, Part 2 The Measures of Science The Medici Family The Meteorologist's Tool Box The Method's the Key!
(Grade 5-7 Readability) Piranhas (Grade 5-8 Readability) Pizza For Sale (Grade 6-8 Readability) Rosa Parks: Life After the Bus (Grade 5-7 Readability) Scarlet Macaws (Grade 4-7 Readability) Sneak Attack: Japan's Attack on Pearl Harbor (Grade 5-8 Readability) Spider Monkeys (Grade 5-7 Readability) Stripes That Stick Together (Grade 4-7 Readability) The Dr. Arizona Memorial (Grade 5-8 Readability) The World's Longest Rivers: The Amazon River (Grade 6-8 Readability) The World's Longest Rivers: the Nile (Grade 6-8 Readability) The World's Longest Rivers: the Yangtze River (Grade 6-8 Readability) To Top It Off -- An Amazing Array of Pizza Toppings! The Milky Way Galaxy The Monroe Doctrine The Monster of Lake Champlain The Montgomery Bus Boycott The Moon The Most Exciting Two Minutes in Sports: The Kentucky Derby The Mouse Finds a House The Munich Massacre The Mystery of the Fifth Window, Part Four The Mystery of the Fifth Window, Part One The Mystery of the Fifth Window, Part Three The Mystery of the Fifth Window, Part Two The Mystery of the Man in the Dark The Narrative Essay The Navajo Wars The Navigator's Tools The Nazi Party The Never-Ending War The New England Colonies The New Morran Family The New Ocean The Nez Perce War The Night of Broken Glass The Nile and Ancient Egypt The Norman Conquest The North after the Civil War The Northwest Ordinance The Northwest Rebellion The Nosy Space Ship The Nuremberg War Crimes Trials The Oath of Office The Ojibwa The Old Man of the Mountain The Old Swamp Fox: General Francis Marion The Olympic Torch Makes Its First Trip Around the World The Orchestra versus the Band The Oreo Is Here to Stay The Ottoman Empire The Oxygen-Carbon Dioxide Cycle The Ozone Layer and You The Paper Clips Project The Paris Peace Conference The Peace Corps The Peace of Westphalia The Pequot War The Periodic Table The Philippine Sea The Piltdown Man Hoax The Piston Push The Planet Facts! Part 2 The Plant Kingdom The Power of Sound The Powers of the Judicial Branch The Powers of the Legislative Branch The President Is Shot The President's Cabinet The President's Role in Passing Laws The President's Staff The Protist Kingdom The Pulitzer Prize The Purloined Web Page, Part 1 The Purloined Web Page, Part 2 The Quebec Bridge Disaster The Quebec Separatists The Queen of Talk Shows The Race to Nome: The 1925 Alaska Serum Run The Race to the South Pole The Rainforest The Real Fat Albert Kid The Reason for the Seasons The Red Scare The Reign of Terror The Renaissance in France The Renaissance in Northern Europe The Rise and Fall of the Beatles The Road to Publication The Rocky Planets The Rogue and Red River Wars The Roman Republic The Romans in Britain: Hadrian's Wall The Rotten Truth The Russian Defeat at Tannenberg The Sago Mine Disaster The San Francisco Earthquake The Schlieffen Plan The Science of "Rocket Science" The Science of Fireworks The Scientific Method The Scoop on Poop The Secret of Silk The Secret of the Code Breakers, Part 1 The Secret of the Code Breakers, Part 2 The Selkirk Settlement The Seminoles Wars The Seven Wonders of the Ancient World The Seven Years War The Sforza Family The Sioux Wars The Slave Trade The Southern Colonies The Space Needle: A Washington Landmark The Space Race The Spanish Flu Pandemic of 1918 The Spelling Bee The Stamp Act The Statue of Christ in Rio de Janeiro The Story of Julius and Ethel Rosenberg The Structure of a Leaf The Structure of a Root The Structure of a Stem The T-shirt Becomes the Rage The Tale of the Taj Mahal The Tango Hits New York The Thirty Years War The Titans The Tower of Babel and the Hanging Gardens of Babylon The Townshend Acts The Transcontinental Railroad The Treaty of Versailles The Tri-State Tornado of 1925 The Triangle Shirtwaist Factory Fire The Truck That Did Everything But Bake a Cake The United Nations Becomes a Reality The United States Enters World War I The Urinary Bladder and Urethra The Ute Wars The War in South Africa The War of Spanish Succession The War of the Roses The Water Cycle The Wet Treatment, Part 1 The Wet Treatment, Part 2 The White House Staff The Winter Olympics in Italy The i Phone Arrives Theme There Is No Such Thing as a Stupid Question They Reached for the Stars and Became One Thomas Edison: The Wizard of Menlo Park Thomas Fitzpatrick, AKA Broken Hand, Part 1 Thomas Fitzpatrick, AKA Broken Hand, Part 2 Thomas Jefferson Thomas Ponders Genetically Engineered Food Thousands Die in Bhopal Three Kinds of Fishes Three Kings Day Three R's to Help the Earth Three Types of Mammals Three Ways to Listen Thriftiness Through the Golden Door Immigration in the 1890s, Part 2 Through the Golden Door-Immigration in the 1890s, Pt.
(Grade 6-9 Readability) Anne Frank's Published Diary (Grade 5-7 Readability) Anne's Published Diary (Grade 5-7 Readability) As American As Apple Pie (Grade 6-8 Readability) Atoms and Matter (Grade 5-8 Readability) Attorney General (Grade 6-8 Readability) Avery Island, Louisiana, Also Known As "Bird City" (Grade 7-9 Readability) Axolotls (Grade 5-7 Readability) Bengal Tigers (Grade 6-8 Readability) Billy Demong: Skier with an Odd Tattoo (Grade 6-8 Readability) Bubble, Bubble, Would This Soil Cause Trouble? Understanding Pictures and Graphics Understanding Point of View Understanding Your Bank Statement Unicellular Organisms United States Citizenship United States Immigration Laws 1900-1960 United States Immigration Laws 1960-2001 United States Immigration Laws in the 18th and 19th Centuries Unusual Mammals: Marsupials & Monotremes Upper Canada Uranus, the Sideways Planet Uruguay - Culture: Horacio Quiroga Uruguay - History Using Different Reading Rates Using Energy Efficiently Using Technology to Study Lightning V-J Day, Part 1 - Longing for Peace V-J Day, Part 2 - "It's Over!
(Grade 5-7 Readability) Busy as a Beekeeper (Grade 5-7 Readability) Carbohydrates (Grade 5-8 Readability) Carrion Flowers (Grade 5-8 Readability) Celebrating Pie! " Valentina Tereshkova - First Woman In Space Valentine's Day Around the World Valley Forge - Winter of 1777-1778 Vasco da Gama Vatican - Culture Vatican - History Velma Bronn Johnston - Wild Horse Annie Venezuela - Culture: Teresa de la Parra Venezuela - History Venus Vertebrate Classification: Phylum Chordata Victoria Woodhull Victorian Dances Victorian Gardens Vietnam - History (Grades 6-9) Vietnam Vikings on the Move Violence Prevention Virginia City - A Boom Town Volcanic Hot Spots Volcanic Material Volcanoes and the Power of Three Walking with the Walkman Walruses Walter Dean Myers: Urban Storyteller War Beneath the Waves - Sardine Duty: Life as a Submariner War on Disease, Part 1 - Attacking Polio War on Disease, Part 2 - New Weapons Warrior's Heart, Part 1 - Ira Hayes Warrior's Heart, Part 2 - Ira Hayes Warriors and Heroes - Native Americans in World War II Washington, D. Watch Out, Here Comes a Horseless Carriage Watch the Birdie Water Pollution in the Hudson River: Captain Maher's Story Water Skis Water Vapor and Weather Water, Water Everywhere: Furious Floods Waves and Rays, Part I Waves and Rays, Part II Weapons of Siege Weathering - The Breakup of Rocks Wentworth Cheswill, Revolutionary Patriot Wernher Von Braun West to Freedom - African American Pioneers West to Freedom - Nat Love and Bill Pickett Whales Whaling Controversy What "Seis" Shake?
Afghanistan African Praise Poetry African-American Artists Air - The Atmosphere Air Jordan Air Navigation, Part 1 Air Navigation, Part 2 Al "Scarface" Capone Al Gore Wins the Nobel Peace Prize Al-Qaeda--"The Base" Alan Shepard - First American in Space Alaska for Sale Albert Marrin Alberto Tomba - Italian Ski Champion Alcohol Abuse: A Tale of Destruction Alcoholics Anonymous Alcoholism Affects Everyone Alex Flinn Alexander Hamilton Alger Hiss and the Pumpkin Patch Mystery All About Apples: A Brief History of Apples All About Credit, Part 1 All About Credit, Part 2 All About the Biathlon All About the Luge All the Spheres of the Earth Alligator Snapping Turtle Ally Carter Along Came the Engine (Part 1) Along Came the Engine (Part 2) Alphabet Soup II - Roosevelt's New Deal Alphabet Soup for a Sick Nation - Roosevelt's New Deal Amanda's Story: Dealing with Acne America's Foreign Policy America's New Year Celebration: The Tournament of Roses America, At Whose Cost?