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Hi,

When a teacher makes each test more difficult than the previous one, can I say that they:

‘up the difficulty level’

‘ramp up the difficulty level’?

Perhaps you can think of something better.

Thank you.

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I would say both of these are reasonable. You could, of course, 'increase the difficulty level', and 'level of difficulty' could replace 'difficulty level' in any of these examples if you need variation.

Comments  
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Ann225‘ramp up the difficulty level’?

This gives the impression that a test has been made much more difficult.

Thank you both for your inputs.