Catherine Weiskopf Books

Lemon & ice & everything nice!
Lemon & ice & everything nice!

By Catherine Weiskopf

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Two best friends open a lemonade stand to earn money for matching pairs of pink sunglasses, but they have a hard time determining what a glass of lemonade is worth. Includes math problems and a lem...

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Adventures in mathopolis
Adventures in mathopolis

By Linda Powley

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Walking with God
Walking with God

By Catherine Weiskopf

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Walking with God
Walking with God

By Catherine Weiskopf

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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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