Gloria Chen Books

What is next

By Gloria Chen

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Red, white, red, white, red. Do you know what is next? You'll see many patterns in this book!

Patterns in music

By Gloria Chen

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You can see patterns in many places. You can hear and create patterns in music, too!

Patterns in music

By Gloria Chen

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You can see patterns in many places. You can hear and create patterns in music, too!

Longer or Shorter Rising Readers Math Level C

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Mas Largo o Mas Corto

By LLC Newmark Learning, Loren Mack, Gloria Chen

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Patterns in Music Interactive Set

By Newmark Learning, Gloria Chen

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How to Convert ISBN-10 to ISBN-13 (and Vice Versa): A Complete Guide

If you’re in the world of books—whether as a publisher, librarian, bookseller, or avid collector—you’ve likely come across the terms ISBN-10 and ISBN-13. Understanding these formats and knowing how to convert between them is essential for maintaining consistency and compatibility in book records. In this post, we’ll cover everything you need to know about ISBN conversions, step by step.

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.