Roberta Duyff Books

Whole Language Guide
Whole Language Guide

By Roberta Duyff

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The bread that grew
The bread that grew

By Roberta Larson Duyff

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When the bakers' children are baking bread, one of them adds a mysterious something that causes the dough to grow and grow.

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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.

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