Grade 6

The United States military is the largest in the world. The Air Force, Army, Coast Guard, Marine Corps, and Navy work together to protect the interests of the United States and its allies… More →

Put on your hiking boots and get ready to explore mountains, canyons, coastlines, and more! This series takes readers on a trip to some of the most popular national parks in the United… More →

Just one furry otter or buzzing bee makes a big impact. Keystone species are vital to the survival of entire ecosystems. But they are facing mounting threats due to climate change. Explore… More →

From the American Revolutionary War to the Cold War, conflict has been present throughout much of history. Through leveled text and vibrant, accurate images, this engaging series introduces… More →

Climate is the usual weather found in a place, from how much rain it gets in a year to a change in temperature during a certain month or season. Earth's climate is always changing, but what… More →

All around the world, there are sites where the horrors of the past have left a permanent mark. The dark and disturbing histories leave a lasting impression that visitors can still feel to… More →

All around the world, there are sites where the horrors of the past have left a permanent mark. The dark and disturbing histories leave a lasting impression that visitors can still feel to… More →

The world around us is full a history that still shapes the present. Explore world history curriculum through carefully leveled text and dyslexic-friendly font and design. This curricular… More →

More and more, robots are extending their reach in the working world. Today, these high-tech helpers are builders on assembly lines, surgical assistants, recon specialists, space explorers,… More →

Kids won't believe their eyes when they see these super-huge machines! From heart-stopping roller coasters that are as tall as a 45-story building to monster-size trucks with wheels that are… More →

Get ready to enter the ring with some of today's fiercest professional wrestlers! In Wrestling's Tough Guys, kids discover how wrestlers such as John Cena, Randy Orton, The Rock, and Triple H More →

Are you ready for the smackdown? Growing readers can learn about professional wrestling superstars, their moves, and their victories in this low-level series. From signature moves to final… More →