Sandra Markle Books

Science in a bag
Science in a bag

By Sandra Markle

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Provides instructions for sixteen scientific experiments to complete using large and small self-sealing plastic bags.

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Outside and inside you
Outside and inside you

By Sandra Markle

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Science--just add salt
Science--just add salt

By Sandra Markle

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Provides instruction for fifteen scientific experiments using salt.

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Science in a bottle
Science in a bottle

By Sandra Markle

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Provides instructions for science tricks and activities to complete using plastic bottles and glass bottles.

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Science Surprises
Science Surprises

By Sandra Markle

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Earth Alive
Earth Alive

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The Big Book of Health
The Big Book of Health

By Sandra Markle

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Hands-on science
Hands-on science

By Sandra Markle

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What is an EAN and How Does it Relate to an ISBN?

If you’ve ever purchased a product online or in a store, you’ve likely come across a barcode. Behind these barcodes lies a standardized system that makes modern commerce possible. Two key codes often encountered are the EAN (European Article Number) and ISBN (International Standard Book Number). But what are they, how are they connected, and why are they so crucial? Let’s explore.

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