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Dr Birdley Teaches Science: Atomic Structure and Chemical Reactions
Nevin Katz,
Dr Birdley Teaches Science: Classifying Cells
Dr Birdley Teaches Science: Constructing the Earth
Dr Birdley Teaches Science: Elements, Compounds and Mixtures
Dr Birdley Teaches Science: Forces and Motion
Dr Birdley Teaches Science: Introducing Cells
Dr Birdley Teaches Science: Mysteries of the Earth
Dr Birdley Teaches Science: Parts of the Cell
Dr Birdley Teaches Science: Properties of Matter