Key Curriculum Press Books

Geometer Sketchpad

By Key Curriculum Press

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Discovering geometry

By Key Curriculum Press

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Teachers Guide to accompany student text. Includes Cooperative Learning Suggestions;Course Outlines;Lesson Guides; Answers Keys; Conjectures, Postulates and Theorems; and a glossary.

Stella Octangula Videos

By Key Curriculum Press

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Fathom Dynamic Statistics

By Key Curriculum Press

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Discovering Geometry

By Michael Serra

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Discovering Geometry

By Steven Rasmussen

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The Geometer s Sketchpad Student Edition Version 3 CD ROM Boxed Set

By Key Curriculum Press

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101 project ideas for the Geometer's Sketchpad

By Steven Chanan

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The Geometer s Sketchpad R

By Key Curriculum Press

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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.