Transition to university

Chris Graham on Find the equation of a line through two points - zero gradient 8 years, 4 months ago

Gave some feedback: Ready to use

Chris Graham on Find the equation of a line through two points - positive gradient 8 years, 4 months ago

Gave some feedback: Ready to use

Christian Lawson-Perfect on Find the equation of a line through two points - positive gradient 8 years, 4 months ago

Gave some feedback: Ready to use

Christian Lawson-Perfect on Find the equation of a line through two points - positive gradient 8 years, 4 months ago

Saved a checkpoint:

Made sure neither of the points lies on the $y$-axis.

Split $a$ into two parts, since you need to work out the gradient before you find the $y$ intercept.

Reworded some of the advice a bit.

Chris Graham on Creating Frequency Tables 8 years, 4 months ago

Gave some feedback: Ready to use

Chris Graham commented on Creating Frequency Tables 8 years, 4 months ago

Added tallies to the first table, rather than giving an empty table followed by the table with frequencies entered. And shortened the advice signficantly to make it more concise. 

Christian Lawson-Perfect on Use speed and distance to calculate time 8 years, 4 months ago

Gave some feedback: Ready to use

Christian Lawson-Perfect on Use speed and distance to calculate time 8 years, 4 months ago

Saved a checkpoint:

You'd never be told the speed of a greyhound without knowing its time, but you might know how fast the rabbit goes, so I've changed to that.

Christian Lawson-Perfect on Exponential increase 8 years, 4 months ago

Gave some feedback: Ready to use

Christian Lawson-Perfect on Exponential increase 8 years, 4 months ago

Saved a checkpoint:

Used the currency function to make sure prices are displayed properly (two d.p. when not a whole number of pounds)

Good question!

Christian Lawson-Perfect on Identify independent events 8 years, 4 months ago

Gave some feedback: Should not be used

Christian Lawson-Perfect on Identify independent events 8 years, 4 months ago

Saved a checkpoint:

The options don't explicitly list two events! They're all of the form "event A given event B" - B isn't an event you can put a probability on, because it's already happened.

I can't find a quick way of rewording this so it makes sense, so I'm marking as shouldn't use.

Christian Lawson-Perfect on Lowest common multiples 8 years, 4 months ago

Gave some feedback: Ready to use

Christian Lawson-Perfect on Lowest common multiples 8 years, 4 months ago

Saved a checkpoint:

The naive approach is to write out the times tables for each number, so I've put that in the advice. 

I've reworded "$a$ and $b$ are coprime" to "$a$ and $b$ have no factors in common", which is hopefully a bit easier to agree with if you're not good at spotting primes.

Chris Graham commented on Solving Quadratic Equations with $x^2$ Coefficients of 1 by Factorising 8 years, 4 months ago

Appears to be very similar to https://numbas.mathcentre.ac.uk/question/22699/factorising-quadratic-equations-with-x-2-coefficients-of-1/ - I suspect as this had not received any feedback to date, that this was Hannah's question from the first day and that she marked it needs to be tested before leaving - since the other question has been thoroughly tested and covers very similar material I have marked this "should not be used" for the time being. 

Christian Lawson-Perfect on Compound units : shopping for bananas 8 years, 4 months ago

Gave some feedback: Ready to use

Christian Lawson-Perfect on Compound units : shopping for bananas 8 years, 4 months ago

Saved a checkpoint:

Fixed a static pronoun. Otherwise, good.

Chris Graham on Solving Quadratic Equations with $x^2$ Coefficients of 1 by Factorising 8 years, 4 months ago

Gave some feedback: Should not be used

Christian Lawson-Perfect on Converting units of volume (cc/cm^3/litres/m^3) 8 years, 4 months ago

Gave some feedback: Ready to use

Christian Lawson-Perfect on Converting units of volume (cc/cm^3/litres/m^3) 8 years, 4 months ago

Saved a checkpoint:

Fixed a typo. Otherwise good!