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 - either use the Feedback button on the left or email me.

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Christian's activity

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Christian Lawson-Perfect on Factorising Quadratic Equations with $x^2$ Coefficients of 1 3 months ago

Saved a checkpoint:

Replaced JavaScript marking with pattern restrictions.

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Christian Lawson-Perfect on Expansion of brackets 3 months, 1 week ago

Saved a checkpoint:

Replaced string restrictions with pattern restrictions.

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Christian Lawson-Perfect on Expand brackets and collect like terms 3 months, 1 week ago

Saved a checkpoint:

Replaced javascript with pattern restrictions in every part

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Christian Lawson-Perfect on Create an algebraic expression from a word problem, simplify, and evaluate 3 months, 1 week ago

Saved a checkpoint:

Replaced javascript in part cwith a pattern restriction.

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Christian Lawson-Perfect on Converting from standard index form to decimal. 3 months, 1 week ago

Saved a checkpoint:

Replaced string restriction with a pattern restriction

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Christian Lawson-Perfect on Truth tables 4 (v2) 3 months, 1 week ago

Saved a checkpoint:

Can't convert grids of booleans to matrices automatically any more, so I've added a function 'bool_matrix' to do that.