Loreen Leedy Books

Houghton Mifflin Mathmatics Literature Library Reader Level 2 Measuring Penny

By HOUGHTON MIFFLIN

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Missing math

By Loreen Leedy

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Everyday activities come to a halt when an animal town loses its numbers.

Measuring Penny

By Loreen Leedy

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Lisa learns about the mathematics of measuring by measuring her dog Penny with all sorts of units, including pounds, inches, dog biscuits, and cotton swabs.

Mapping Penny's world

By Loreen Leedy

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After learning about maps in school, Lisa maps all the favorite places of her dog Penny.

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.