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Wedges

Simple Machines (Series)

Andrea Rivera Author
(2017)

Wheels and Axles

Simple Machines (Series)

Andrea Rivera Author
(2017)

Pulleys

Simple Machines (Series)

Andrea Rivera Author
(2017)

Screws

Simple Machines (Series)

Andrea Rivera Author
(2017)

Trains

Powerful Machines (Series)

Andrea Rivera Author
(2017)

Recycling

Our Renewable Earth (Series)

Andrea Rivera Author
(2017)

Cars

Powerful Machines (Series)

Andrea Rivera Author
(2017)

Water

Our Renewable Earth (Series)

Andrea Rivera Author
(2017)

Sun

In the Sky (Series)

Andrea Rivera Author
(2017)

Solar Power

Our Renewable Earth (Series)

Andrea Rivera Author
(2017)

Thunder & Lightning

In the Sky (Series)

Andrea Rivera Author
(2017)

Wind Power

Our Renewable Earth (Series)

Andrea Rivera Author
(2017)

Trucks

Powerful Machines (Series)

Andrea Rivera Author
(2017)

Light

Science Concepts (Series)

Andrea Rivera Author
(2017)

Hurricanes

Natural Disasters (Series)

Andrea Rivera Author
(2017)

Soils

Rocks and Minerals (Series)

Andrea Rivera Author
(2017)

Clouds

In the Sky (Series)

Andrea Rivera Author
(2017)

Motorcycles

Powerful Machines (Series)

Andrea Rivera Author
(2017)

Conservation

Our Renewable Earth (Series)

Andrea Rivera Author
(2017)

Rocks

Rocks and Minerals (Series)

Andrea Rivera Author
(2017)

Boats

Powerful Machines (Series)

Andrea Rivera Author
(2017)

Metal

Materials (Series)

Andrea Rivera Author
(2017)

Living and Nonliving

Science Concepts (Series)

Andrea Rivera Author
(2017)

Lakes & Rivers

Habitats (Series)

Andrea Rivera Author
(2018)

Gems

Rocks and Minerals (Series)

Andrea Rivera Author
(2017)

Plants

Our Renewable Earth (Series)

Andrea Rivera Author
(2017)

Droughts

Natural Disasters (Series)

Andrea Rivera Author
(2017)

Motion

Science Concepts (Series)

Andrea Rivera Author
(2017)

Fossils

Rocks and Minerals (Series)

Andrea Rivera Author
(2017)

Wildfires

Natural Disasters (Series)

Andrea Rivera Author
(2017)

Plastic

Materials (Series)

Andrea Rivera Author
(2017)

Cloth

Materials (Series)

Andrea Rivera Author
(2017)

Rain

In the Sky (Series)

Andrea Rivera Author
(2017)

Snow

In the Sky (Series)

Andrea Rivera Author
(2017)

Tornadoes

Natural Disasters (Series)

Andrea Rivera Author
(2017)

Paper

Materials (Series)

Andrea Rivera Author
(2017)

Earthquakes

Natural Disasters (Series)

Andrea Rivera Author
(2017)

Sound

Science Concepts (Series)

Andrea Rivera Author
(2017)

Minerals

Rocks and Minerals (Series)

Andrea Rivera Author
(2017)

Glass

Materials (Series)

Andrea Rivera Author
(2017)

Gravity

Science Concepts (Series)

Andrea Rivera Author
(2017)

Airplanes

Powerful Machines (Series)

Andrea Rivera Author
(2017)

Ores

Rocks and Minerals (Series)

Andrea Rivera Author
(2017)

Tsunamis

Natural Disasters (Series)

Andrea Rivera Author
(2017)

Wood

Materials (Series)

Andrea Rivera Author
(2017)

Moon

In the Sky (Series)

Andrea Rivera Author
(2017)

Air

Science Concepts (Series)

Andrea Rivera Author
(2017)