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The mistakes that cost IB students marks, and how to fix them

Most lost marks aren't gaps in knowledge. They're the same handful of slips, repeated: a unit dropped, "compare" answered as "contrast", a mechanism arrow pointing the wrong way, a graph read off the wrong axis. Each guide here lists the mistakes that come up again and again in one subject, shows the losing answer next to the winning one, and gives you a habit that stops it happening in the exam.

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