Member of the e-learning unit in Newcastle University's School of Mathematics and Statistics.

Lead developer of Numbas.

I'm happy to answer any questions - email me.

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Christian Lawson-Perfect on Addition and subtraction of fractions 8 years, 5 months ago

Gave some feedback: Has some problems

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Christian Lawson-Perfect on Addition and subtraction of fractions 8 years, 5 months ago

Saved a checkpoint:

I've removed the "without a calculator" bit - I don't care how students add fractions, as long as they can do it!

The advice for parts b and could be a lot shorter - say what's different from the previous part, how to deal with it, and then briefly show the working out.

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Christian Lawson-Perfect on Using the Logarithm Equivalence $\log_ba=c \Longleftrightarrow a=b^c$ 8 years, 5 months ago

Saved a checkpoint:

I've changed the last part to a "choose several from a list" type, because it makes more sense.

I've also reworded the advice a bit.

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Christian Lawson-Perfect on Calculate the areas of polygons 8 years, 5 months ago

Gave some feedback: Has some problems

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Christian Lawson-Perfect on Calculate the areas of polygons 8 years, 5 months ago

Saved a checkpoint:

Why do I need to round my answer at all?

I agree with Vicky and Hannah's suggestions.

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Christian Lawson-Perfect on Basic arithmetic operations: addition and subtraction 8 years, 5 months ago

Gave some feedback: Ready to use

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Christian Lawson-Perfect on Basic arithmetic operations: addition and subtraction 8 years, 5 months ago

Saved a checkpoint:

Lovely question, but it could be split into three separate questions. In particular, I'd like to be able to submit my answers for each of the sums in part a without completing the rest.

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Christian Lawson-Perfect on Always, sometimes or never: square and cube numbers 8 years, 5 months ago

Gave some feedback: Ready to use

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Christian Lawson-Perfect on Always, sometimes or never: square and cube numbers 8 years, 5 months ago

Saved a checkpoint:

Lovely question!