- How do plants grow?
- How do plants survive?
- How Do They Build a Skyscraper?
- How do we know it is fall?
- How do we know it is spring?
- How do we know it is summer?
- How do we know it is winter?
- How Do Wind and Water Change Earth?
- HOW Does A Roller Coaster Stay On The Track?
- HOW Does A Roller Coaster Stay On The Track? Read-Along
- How Does a Seed Sprout?
- How Does an Almond Seed Grow into a Tree?
- How Does An Elephant Hatch An Egg?
- How Does My Body Work? Human Body Book for Kids
- How Egrets Got Their Long Legs
- How Engineers Solve Problems
- How Heat Moves
- How I Save the Earth
- How Is a Bandage Like a Worm?
- How Is a Building Like a Termite Mound?
- How Is a Ship Like a Shark?
- How Is a Turbine Like a Whale Fin?
- How Many Hairs on a Grizzly Bear?
- How Many Mice Make An Elephant?
- How Mountains Are Made
- How Muscles Work
- How Muscles Work
- How Plants Grow
- How they live
- How they live... Amphibians
- How they live... Bats
- How they live... Birds
- How they live... Owls
- How they live... Reptiles
- How they live... Rodents
- How to Bake a Universe
- How to Be a Butterfly
- How to Be Good at Science, Technology and Engineering Workbook, Grades 2-5
- How to Build a Human
- How to Build Box Cars and Trucks
- How To Change Everything
- How to Find a Bird
- How to Find a Fox
- How to Hear the Universe
- How to Make a Piñata
- How to Make a Terrarium
- How to Make an Ant Farm
- How to Say Hello to a Worm
- How to Spy on a Shark
- How to Tap a Maple!
- How Toys Work
- How We Got to the Moon
- How Well Do You Know the Planets?
- How Would You Survive as a Lion?
- How Would You Survive as a Polar Bear?
- How You Can Save the Planet
- How's the Weather in Spring?
- How's the Weather in Summer?
- How's the Weather in Winter?
- How Are Rain, Snow, and Hail Alike?
- Huesos en exhibición
- Human Anatomy in Full Color
- Human Body Systems
- Human Body!
- Human Emotions
- Human Migration
- Human Movement
- Hunde, Grøn Fagklub
- Hungriest Mouth in the Sea, The
- Hungry Plants
- Hurricane Katrina and the Devastation of New Orleans, 2005
- Hurricane Watch
- Hurricanes! (New & Updated Edition)
- Hvaler, Grøn Fagklub
- Hvor langt er der til verdens ende?
- Hyppy ajassa