Theodore R. Sizer Books

The new American high school

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"The late Theodore Sizer's vision for a truly democratic public high school system. Our current high schools are ill-designed and inefficient. We have inherited a program of studies that in its ove...

Secondary Schools at the Turn of the Century

By Theodore R. Sizer

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Red Pencil

By Theodore R. Sizer

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Moral Questions in the Classroom

By Katherine G. Simon, Theodore R. Sizer, Nancy Faust Sizer

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Horace s Hope

By Theodore R. Sizer

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Horace s Compromise

By Theodore R. Sizer

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Horace s School

By Theodore R. Sizer

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Horace s Compromise

By Theodore R. Sizer

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Horace s Compromise

By Theodore R. Sizer

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Moral Education

By Nancy F. Sizer, Theodore R. Sizer, Lawrence Kohlberg, Richard S. Peters, James M. Gustafson

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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.