Tracey Steffora Books

Relojes y Calendarios
Relojes y Calendarios

By Tracey Steffora

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Dias de la Semana
Dias de la Semana

By Tracey Steffora

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Horas Minutos y Segundos
Horas Minutos y Segundos

By Tracey Steffora

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Meses Del Ano
Meses Del Ano

By Tracey Steffora

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Estaciones Del Ano
Estaciones Del Ano

By Tracey Steffora

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Horas Del Dia
Horas Del Dia

By Tracey Steffora

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Math at the Airport
Math at the Airport

By Tracey Steffora

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Math at the Hospital
Math at the Hospital

By Tracey Steffora

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Math at the Store
Math at the Store

By Tracey Steffora

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Related Articles from our Blog

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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