John Gray Books

The supportive school
The supportive school

By John Gray

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The Supportive School tackles some important contemporary issues of interest to teachers, parents and policy-makers alike. There is a widespread perception across the developed world that the socia...

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The supportive school
The supportive school

By John Gray

Average: 0.00, 0 Ratings

The Supportive School tackles some important contemporary issues of interest to teachers, parents and policy-makers alike. There is a widespread perception across the developed world that the socia...

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Conservative disposition
Conservative disposition

By John Gray

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The supportive school
The supportive school

By John Gray

Average: 0.00, 0 Ratings

The Supportive School tackles some important contemporary issues of interest to teachers, parents and policy-makers alike. There is a widespread perception across the developed world that the socia...

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Tasi sijak hanu n iyagi
Tasi sijak hanu n iyagi

By John Gray

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Marte e Venus junto para sempre
Children Are from Heaven
Children Are from Heaven

By John Gray

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Mars and Venus in Love
Mars and Venus in Love

By John Gray

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Mars and Venus on a Date
Mars and Venus on a Date

By John Gray

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Mars and Venus Starting Over
Mars and Venus Starting Over

By John Gray

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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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