The series makes a key topic in the middle school science curriculum accessible to students reading below grade level. HI-LO/reading level grade 3. Save $1 per book when ordering 10 or more copies.

Earth may seem like a solid mass, but hundreds and thousands of miles beneath our feet, its many layers are constantly changing. HI-LO/reading level grade 3. Save $1 per book when ordering 10 or more copies.

Throughout the world, from deserts to rain forests, Earth’s plants, animals, and insects are working together with their environment. HI-LO/reading level grade 3. Save $1 per book when ordering 10 or more copies.

What is the difference between a renewable and nonrenewable resource? How do humans affect the condition of Earth’s air, water, and soil? HI-LO/reading level grade 3. Save $1 per book when ordering 10 or more copies.

People today can never know exactly what was happening on Earth many millions of years ago, but rocks and fossils have helped scientists learn a great deal. HI-LO/reading level grade 3. Save $1 per book when ordering 10 or more copies.