IGCSE Computer Science 0478: Check digits for data entry

Students learn how check digits, such as those in ISBNs and bar codes, are calculated and used to catch data entry errors, and what they cannot catch.

One content description from the full IGCSE Computer Science 0478 — 2.2 Methods of Error Detection journey. All 8 modules below are in that journey too, with the same content — add just these to a class, or the whole strand.

Modules (8)

1 Validation versus verification 2 Check digit 3 Typing errors that a check digit detects 4 Calculating a check digit with weights and modulus 11 5 ISBN-13 check digit 6 Bar code check digit 7 Checking a number with its check digit on entry 8 What a check digit cannot detect

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