Levelled Books

  • Smithsonian Readers 3: Predicting Earthquakes

    Smithsonian Readers 3: Predicting Earthquakes

    Seismologists have an important job. These scientists study earthquakes. Why is it so important to study earthquakes? By studying quakes, seismologists can help protect people from injury and death...

  • Smithsonian Readers 3: Raising Clouded Leopards

    Smithsonian Readers 3: Raising Clouded Leopards

    The clouded leopard is a shy and reclusive cat. This relative of lions and tigers is an endangered species. Their shy nature makes studying them difficult for zookeepers and scientists. Discover what...

  • Smithsonian Readers 3: Restoring Muddy Creek

    Smithsonian Readers 3: Restoring Muddy Creek

    Streams are an important part of our world. They are the source of drinking water for countless plants and animals. But many streams are eroding. In Maryland, there is a huge effort to restore Muddy...

  • Smithsonian Readers 3: Taking Photos from Space

    Smithsonian Readers 3: Taking Photos from Space

    Landsat satellites are the superheroes of space. They orbit Earth to get images. These images can help stop catastrophes, and solve great mysteries. From poisoned water to raging fires, Landsat sees...

  • Smithsonian Readers 3: The Wright Brothers

    Smithsonian Readers 3: The Wright Brothers

    Have you ever wondered how something flies? Wilbur and Orville Wright had the same question more than 100 years ago. Today, the Wright brothers are known as the forefathers of flight. Learn about the...

  • Smithsonian Readers 3: Underwater Training

    Smithsonian Readers 3: Underwater Training

    Did you know astronauts train in water before going to space? They're not the only ones who use swimming pools for training. Athletes train in water when they are hurt. Doctors use water treatments...

  • Smithsonian Readers 4: Conserving an Aircraft

    Smithsonian Readers 4: Conserving an Aircraft

    The Horten Ho 229 was an experimental German airplane created by the Nazis. They believed its innovative design would help them win the war. Although this experimental aircraft never worked as...

  • Smithsonian Readers 4: Designing a Shuttle

    Smithsonian Readers 4: Designing a Shuttle

    How do you build a reusable spacecraft that is strong enough to hold up in outer space, but is light enough to fly? How do you design it to meet the needs of the astronauts it carries? In the 1970s,...

  • Smithsonian Readers 4: Electric Vehicles

    Smithsonian Readers 4: Electric Vehicles

    Electric vehicles, or EVs, have been around for over 100 years. The first EV that people could buy went on sale in 1894. The Electrobat" could go 25 miles on one battery charge. Today's EVs are...