Christian Lawson-Perfect
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.
Christian's activity
Christian Lawson-Perfect commented on Applied y-intercepts: Investing in boats 8 years, 5 months ago
I don't like how the graph works - why drag a slider and not the line itself?
The label on the slider says "p = ..." - what's p?
Christian Lawson-Perfect on Factorising Quadratic Equations with $x^2$ Coefficients of 1 8 years, 5 months ago
Gave some feedback: Ready to use
Christian Lawson-Perfect on Factorising Quadratic Equations with $x^2$ Coefficients of 1 8 years, 5 months ago
Saved a checkpoint:
I've changed the parts so:
- part a always has two negative roots
- part b always has one positive root and one negative
- part c is the difference of two squares.
I don't think there was any point in the version which had a constant on the RHS.
I've added a marking script to check that the student's answer is factorised, rather than using string restrictions.
Christian Lawson-Perfect on The gambler's fallacy - probability of getting heads again after repeatedly getting heads 8 years, 5 months ago
Gave some feedback: Ready to use
Christian Lawson-Perfect on The gambler's fallacy - probability of getting heads again after repeatedly getting heads 8 years, 5 months ago
Saved a checkpoint:
Split from a bigger question.
The advice had confused trials with events.
Christian Lawson-Perfect on Which coin is more likely to be biased? 8 years, 5 months ago
Gave some feedback: Ready to use
Christian Lawson-Perfect on Which coin is more likely to be biased? 8 years, 5 months ago
Saved a checkpoint:
Looks good!
Christian Lawson-Perfect on Theoretical Probability vs Experimental Probability 8 years, 5 months ago
Saved a checkpoint:
Looks good!
Christian Lawson-Perfect on Theoretical Probability vs Experimental Probability 8 years, 5 months ago
Gave some feedback: Ready to use