- I Am A Tree, This Is My Story
- I am Albert Einstein
- I Am Bald Eagle
- I am Caring
- I am Curious
- I am Jane Goodall
- I am Marie Curie
- I Am Mary Anning
- I am Neil Armstrong
- I Am Neutrino
- I Am Not a Box!
- I Am Not a Paper Plate!
- I Am Not a Paper Roll!
- I Am Not an Egg Carton!
- I Am the Elwha
- I Am the Rain
- I Am the Shark
- I Can Name 50 Trees Today! All About Trees
- I Eat Apples in Fall
- I Feel Fall Weather
- I fratelli Lumiére e la straordinaria invenzione del cinema
- I Get the Hiccups
- I Have a Bellybutton
- I Live in Alaska
- I Live in Colorado
- I Live in Massachusetts
- I Live in Michigan
- I Love Sugar
- I Love You, ZooBorns!
- I Need Glasses
- I Notice Animals in Fall
- I Pick Fall Pumpkins
- I saw a Killdeer
- I See Fall Leaves
- I See Falling Stars
- I See Rainbows
- I See Sea Food
- I See the Ocean
- I See the Ocean (Enhanced Edition)
- I Want A Bearded Dragon
- I Want A Leopard Gecko
- I Watch Fall Harvests
- I Wonder Who?
- I'm a Reindeer
- I'm a Virus!
- I'm Trying to Love Garbage
- I'm Trying to Love Rocks
- I'm Trying to Love Spiders
- I, Galileo
- I, Humanity
- Ice is Nice! All About the North and South Poles
- Icky, Sticky Slime!
- If a Mummy Could Talk . . .
- If Animals Built Your House
- If animals could talk. The world of animals voices: What is my cry?
- If Bees Disappeared
- If Elephants Disappeared
- If I Ran the Dog Show: All About Dogs
- If I Ran the Horse Show: All About Horses
- If Polar Bears Disappeared
- If Sharks Disappeared
- If We Were Gone
- If You Spent a Day with Thoreau at Walden Pond
- If You Were an Elephant
- If You Were the Moon
- Igualitierra
- Iguanodon
- Iguanodon (Enhanced Edition)
- Iluminar la noche
- Imitar la naturaleza
- Immigration
- In My Backyard
- In Padure
- In Riva al Mare
- In the Beginning
- In the Dark
- In the Forest
- In the Garden
- In the Steps of The Great American Entomologist, Frank Eugene Lutz
- In the Steps of The Great American Herpetologist, Karl Patterson Schmidt
- In the Steps of The Great American Zoologist, William Temple Hornaday
- Incredible Invertebrates
- Incredible Snakes: Exploring Our Incredible World Series
- Increíble pero real: Criaturas diminutas
- Innovators
- Insect Pollinators
- Insect Pollinators (Enhanced Edition)
- Inside the Water Cycle
- Inside the World of Matter
- Inside Your Outside! All About the Human Body
- Interactive Addition
- Interactive Division
- Interactive Multiplication Table
- Interactive Subtraction Table
- Interdependence of Living Things
- Into the Woods
- Introduction to Biology for Babies and Toddlers
- Inuit, Tundra and Ravens
- Inventando el futuro
- Invention of Electricity
- Invention of Phones
- Invention of Robotics
- Inventor, Engineer, and Physicist Nikola Tesla
- Inventors, Bright Minds and Other Science Heroes of South Africa
- Investigating Animal Life Cycles
- Investigating Animal Life Cycles (Enhanced Edition)
- Investigating Electricity (Enhanced Edition)
- Investigating Electromagnetism
- Investigating Heat (Enhanced Edition)
- Investigating Light
- Investigating Light (Enhanced Edition)
- Investigating Magnetism
- Investigating Magnetism (Enhanced Edition)
- Investigating Matter
- Investigating Matter (Enhanced Edition)
- Investigating Plant Life Cycles
- Investigating Plant Life Cycles (Enhanced Edition)
- Investigating Plate Tectonics
- Investigating Seasons
- Investigating Seasons (Enhanced Edition)
- Investigating Simple Organisms
- Investigating Sound (Enhanced Edition)
- Investigating the Carbon Cycle
- Investigating the Carbon Cycle (Enhanced Edition)
- Investigating the Chemistry of Atoms
- Investigating the Human Body
- Investigating the Rock Cycle
- Investigating the Rock Cycle (Enhanced Edition)
- Investigating the Water Cycle
- Investigating the Water Cycle (Enhanced Edition)
- Investiguemos las fuerzas y el movimiento
- Investiguemos los accidentes geográficos
- Is it hard or soft?
- Is it natural or human-made?
- Isaac Newton and the Laws of the Universe