Robert Reys Books

Helping Children Learn Mathematics

By Mary Lindquist, Robert Reys, Diana V. Lambdin, Nancy L. Smith

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Helping Children Learn Mathematics

By Mary Lindquist, Robert Reys, Diana V. Lambdin, Nancy L. Smith

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Helping Children Learn Mathematics

By Mary Lindquist, Robert E. Reys, Diana V. Lambdin, Marilyn Suydam, Nancy L. Smith

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Helping Children Learn Mathematics

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Helping Children Learn Mathematics

By Mary Lindquist, Robert Reys, Nancy L. Smith, Diana V. Lambdin

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The 11th Edition of Helping Children Learn Mathematics is designed to help those who are or will be teachers of mathematics in elementary schools help children develop understanding and proficiency...

Helping Children Learn Mathematics

By Audrey Cooke, Anna Rogers, Leicha Bragg, Melissa Fanshawe, Mark Gronow

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Training pre-service teachers to become confident mathematics educators is a real challenge for education academics. How can we arm our teaching students with practical tools that boost confidence...

Helping Children Learn Mathematics 9th E

By Robert Reys

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Helping Children Learn Mathematics 9th Edition Binder Ready Version with Teaching Elementary Mathematics 4th Edition Set

By Robert Reys

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Helping Children Learn Mathematics

By Robert Reys

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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.