Transition to university

Elliott Fletcher on Using Surds, Rationalising the Denominator 8 years, 6 months ago

Gave some feedback: Needs to be tested

Bradley Bush on Solving linear inequalities 8 years, 6 months ago

Gave some feedback: Needs to be tested

Bradley Bush commented on Solving linear inequalities 8 years, 6 months ago

Thank you for the feedback. I have now changed the questions into gaps to make them less hackable and reworded some of the feedback to be, hopefully, more eloquent and contain less typos. 

Chris Graham on Solving linear inequalities 8 years, 6 months ago

Gave some feedback: Has some problems

Chris Graham commented on Solving linear inequalities 8 years, 6 months ago

You should pull $x<$ outside of the gap (or $x>$, as appropriate) and adjust the correct answers accordingly. The way the marking works is that the part's correct answer is evaluated at a number of test points, and in this case will return logical values: let's say it evaluates to true at all of the test points. If that's the case then any student answer that also evaluates to true at the test points will be marked as correct. Have a go yourself in part (a) with, say, x<100 or x=x.

Some of the wording in the advice needs to be carefully considered. For example, in part (a), are you really "subtracting the constant"? And there is a "constant" on both sides (thoug I appreciate that you give the value). I think I would be more direct and offer motivation for the step, with something like "to obtain x on its own on the left hand side, first add 8 to both sides"

There are a few typos in the advice, which is otherwise laid out nicely.

Lauren Richards on Rationalising the denominator - surds 8 years, 6 months ago

Gave some feedback: Has some problems

Bradley Bush on Expansion of brackets 8 years, 6 months ago

Gave some feedback: Needs to be tested

Bradley Bush commented on Expansion of brackets 8 years, 6 months ago

Thank you again for the feedback, I see what you mean with the statement, and again I am really sorry about the typos. I had changed the statement before but hadn't considered including the simplest form part in it. I am slightly worried that now without any text to preface the questions, the question is looking a bit boring, I'm not sure if there is anyhting I should be writing inbetween questions that you could suggest? 
As for every other question being the same, did you note that the random variable can be both negative and positive. I thought negativity could be a tripping point for someone struggling with expanding brackets, so it would be good to include two versions of each, that way the student wouldn't be put off by a greater variety of the same question? Might it be worth constructing it so that every other example includes negative numbers so they come up less randomly? 

Lauren Richards commented on Surds simplification 8 years, 6 months ago

I have enacted the changes you requested.

Lauren Richards on Surds simplification 8 years, 6 months ago

Gave some feedback: Needs to be tested

Lauren Richards commented on Percentages and ratios - box of chocolates 8 years, 6 months ago

I have acted on the feedback and made the changes you requested. 

Lauren Richards on Percentages and ratios - box of chocolates 8 years, 6 months ago

Gave some feedback: Needs to be tested

Bradley Bush on Solve quadratic inequalities 8 years, 6 months ago

Gave some feedback: Needs to be tested

Bradley Bush commented on Solve quadratic inequalities 8 years, 6 months ago

Thank you for the feedback, those typos were careless and hopefully they are all sorted now, I have also reworded the question for you.

I hate to disagree but I think that it would be useful for students who are struggling in particular to have the factorise step left in the question to give the student a mid way point. But if there is more logic behind removing the gap, I am happy to take it out.

Chris Graham on Surds simplification 8 years, 6 months ago

Gave some feedback: Has some problems

Chris Graham commented on Surds simplification 8 years, 6 months ago

Where you are using \sqrt, you should have braces around the argument \sqrt{...}. Note the difference: $\sqrt100$ and $\sqrt{100}$. 

Also the nth root can be written \sqrt[n]{...}, e.g. \sqrt[3]{100}, $\sqrt[3]{100}$.

If this is the first question on surds when we put questions together, then I think an example surd would be beneficial in the statement.

Bradley Bush on Expand brackets and collect like terms 8 years, 6 months ago

Gave some feedback: Needs to be tested