- Let's Visit the Ocean! A Children's eBook with Pictures of Ocean Animals and Marine Life (A Child's ...
- Let's visit the Zoo! A Children's book with Pictures of Zoo Animals (French Version)
- Let's Walk to School
- Let’s Investigate Plastic Pollution
- Leveled Reading: Earth's Water
- Leveled Reading: Growing Plants
- Leveled Reading: Many Kinds of Leaves
- Leveled Reading: Taking Care of Earth
- Leveled Reading: The Planets
- Leveled Reading: Under a Microscope
- Leveled Reading: What's In the Sky?
- Leões, Leopardos e Tempestades..minha nossa! (Portuguese Edition)
- Life by the Ocean
- Life by the River
- Life Cycles
- Life Cycles of Insects
- Life in a Cube
- Life in Hot Water
- Life in Numbers: Stressed Out!
- Life in the City
- Life in the Forest
- Life in the Mountains
- Life in the Ocean Layers
- Life on a Different Planet
- Life on an Island
- Life Science
- Light Bulb
- Light Waves
- Lighting the Night
- Lightning
- Lights Day and Night
- Lightship
- Like a Tree
- Limpiemos nuestra escuela
- Limu Grows in the Kāheka
- Lions, Leopards, and Storms, Oh My
- Liquids
- Listen to Our World
- Listening to the Stars
- Little Archaeologist
- Little Book for Big Changes
- Little Cloud Lamb
- Little Concepts: A is for Apricat
- Little Katie Goes to the Moon
- Little Leaf, Clever Leaf
- Little Learning Labs: Astronomy for Kids, abridged edition
- Little Learning Labs: Bugs for Kids, abridged edition
- Little Learning Labs: Geology for Kids, abridged edition
- Little Learning Labs: Kitchen Science for Kids, abridged edition
- Little Leonardo's MakerLab: Robots
- Little Loon
- Little Monkey
- Little Sap
- Little Seahorse and the Big Question
- Little Zoologist
- Living Fossils
- Living in Space
- Living Things
- Living Things and Nonliving Things: A Compare and Contrast Book
- Lo que puede hacer el sol
- Lo Stagno
- Lo strano caso della cellula X
- Londres (FR)
- Look At The Birds!
- Look for Ladybug in Ocean City
- Look Inside: Your Brain
- Look Inside: Your Heart and Lungs
- Look Inside: Your Skeleton and Muscles
- Look Up!
- Look!
- Looking For A Lion
- Looking Inside Cells
- Looking Up!
- Lorenz e il segreto di re Salomone
- Los animales necesitan comida
- Los animales necesitan refugio
- Los asombrosos trabajos del planeta Tierra
- Los asteroides y los cometas
- Los cielos nocturnos: Variables, expresiones y ecuaciones
- Los desiertos
- Los gases
- Los huesos
- Los líquidos
- Los músculos
- Los objetos que no son seres vivos
- Los pantanos
- Los pastizales africanos
- Los Pingüinos (Penguins)
- Los pulmones
- Los seres vivos
- Los sueños de Carla
- Los sólidos
- Los viajes perfumados
- Los árboles de globos
- Lost in the Cave
- Lost on a Mountain in Maine
- Lots and Lots of Zebra Stripes
- Louis Pasteur and the Fight Against Germs
- Louis Pasteur and the Science of Germs