David Clemson Books

Charts and Graphs Math Magic

By David Clemson, Wendy Clemson

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Zookeeper for the day

By Wendy Clemson

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Discover how zookeepers use math every day. Use real life data to make actual zookeeper calculations. Practice your math skills doing fun activities. Learn facts about zookeepers and zoo animals. W...

Real World Math Blue Level

By Clemson Wendy Clemson David

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Real World Math Orange Level

By Clemson Wendy Clemson David Sayers Ghislaine

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Dinosaur Dig

By David Clemson, Wendy Clemson

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Treasure in the jungle

By Wendy Clemson

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Discover how explorers use math every day; use real life data to make actual explorer calculations; practice your math skills doing fun activities; learn facts about jungle animals and Incas. With...

Using maths be a zookeeper

By Wendy Clemson

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Has over 50 maths puzzles that show how zookeepers use maths every day. Learn facts about zookeepers and zoo animals and discover how maths is used in real situations. Suggested level: junior, prim...

Solve A Crime Using Maths

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Multiplier en S Amusant

By Clemson Wendy David

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Duden Mein erstes Rechenbuch

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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.