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 on Solving linear inequalities 8 years, 5 months ago
Gave some feedback: Ready to use
Christian Lawson-Perfect on Solving linear inequalities 8 years, 5 months ago
Saved a checkpoint:
I reworded the advice a little bit.
This is a good question - there's a nice progression from simple inequalities to more complicated.
Christian Lawson-Perfect on Use the quadratic formula to solve an equation in terms of an unknown variable 8 years, 5 months ago
Gave some feedback: Ready to use
Christian Lawson-Perfect on Use the quadratic formula to solve an equation in terms of an unknown variable 8 years, 5 months ago
Saved a checkpoint:
Looks good!
Christian Lawson-Perfect on Creating Frequency Tables 8 years, 5 months ago
Gave some feedback: Has some problems
Christian Lawson-Perfect on Creating Frequency Tables 8 years, 5 months ago
Saved a checkpoint:
The advice is pretty redundant! A list of sentences of the form "the number of students who scored X is Y" is effectively the same information as the table.
The advice should explain how to get the answer. I did it by writing rows labelled 0 to 10, and tallying as I worked through the list. How would you do it? Just describing one or two methods, and giving the correct answer, is enough.
Christian Lawson-Perfect on Using the Quadratic Formula to Solve Equations of the Form $ax^2 +bx+c=0$ 8 years, 5 months ago
Gave some feedback: Ready to use
Christian Lawson-Perfect on Using the Quadratic Formula to Solve Equations of the Form $ax^2 +bx+c=0$ 8 years, 5 months ago
Saved a checkpoint:
I'm not sure why part b had two equations in it. I've split it into two parts.
A couple of uses of "question" instead of "equation" in the advice.
The quadratic formula was missing $x=$ a few times in the advice!
Otherwise, this is good.
Christian Lawson-Perfect on Using a speed and acceleration graph 8 years, 5 months ago
Gave some feedback: Ready to use
Christian Lawson-Perfect on Using a speed and acceleration graph 8 years, 5 months ago
Saved a checkpoint:
Looks good!