Lauren Richards

Lauren Richards on Using the Quadratic Formula to Solve Equations of the Form $ax^2 +bx+c=0$ 8 years, 5 months ago

Gave some feedback: Has some problems

Lauren Richards on Mathematical formulae - Volume 8 years, 5 months ago

Gave some feedback: Has some problems

Lauren Richards commented on Mathematical formulae - Volume 8 years, 5 months ago

• You could put the equations for calculating volume for the individual shapes in the actual question or at the start of the advice or as a (show steps) stage.
• You could state what each shape is, or have an introductory statement for each part instead of the overall question statement that generalises all the shapes like "Calculate the volume of the following rectangular-based pyramid.". 
• The little shapes next to Area are awesome. The colourful diagrams are also mint. 
• Make sure you have a full stop after all the final answers in the advice section and you're missing one at the end of the second bit of text in part b) (advice) after depth = []m. This is also true for the second text part of part c) and d). 
• The answer in the advice for part d) is not the same as the expected answer in the question. The advice is the one that is incorrect. You have used h instead of 1/3(h) in the second part. 
• Great question! :) 

Lauren Richards on Factorising Quadratic Equations with $x^2$ Coefficients of 1 8 years, 5 months ago

Gave some feedback: Has some problems

Lauren Richards commented on Factorising Quadratic Equations with $x^2$ Coefficients of 1 8 years, 5 months ago

• MAIN PARTS
• There is a "$" sign in the statement. 
• MAYBE suggest the form to answer the question in in part a) but then again if they have read the statement, they should know which form to have it in so up to you really. 
• I think you should put a full stop after the formula in part b) and then start "input" with a capital letter. 
• ADVICE
• No comma needed after "obtain" in part a)i).
• Part b is fine! 
• Great question!

Lauren Richards commented on Rationalising the denominator - surds 8 years, 5 months ago

I've randomised parts a) to d). 

Lauren Richards on Rationalising the denominator - surds 8 years, 5 months ago

Gave some feedback: Needs to be tested

Lauren Richards on Using Surds, Rationalising the Denominator 8 years, 5 months ago

Gave some feedback: Has some problems

Lauren Richards commented on Using Surds, Rationalising the Denominator 8 years, 5 months ago

• MAIN PARTS
• Part a) should have more numbers rather than just two. 
• I think you will have a problem with people not knowing how to insert a square root sign into their answers, meaning they will be scuppered for all of the questions. I think you will need to tell them how to in the parts by giving an example. Say like "3\sqrt{5} can be written as 3*sqrt(5)". Alternatively, you could set it up via gap fill so that all of the answers can be given in a pre-prepared square root sign. 
• Part b)'s steps could be a little off-putting for someone. They only need the first rule to do part b) but you have given them an extra rule that isn't relevant. It might confuse them. 
• You don't need colons after "Simplify" in each part. 
• Part h), your model answer included an unsimplified numerator, which might not be what the user gives. You didn't multiply out 3(\sqrt{3}+18) but writing 3\sqrt{13}+54 is not wrong. 
• ADVICE
• I think you should restate the question in part a) after stating the rule and before the actual advice for part a). 
• The examples listed for part a) and b) were not the ones I was asked in the test run. It was talking about \sqrt{405} both times when I had been asked about \sqrt{1377} in part a) and \sqrt{1053} in part b).
• In part c), I think you should show how the fraction cancels down a bit more by stating that the two \sqrt{17} cancel on the numerator and denominator. Someone might get lost if they followed the first method. 

Lauren Richards on Extract common factors of polynomials 8 years, 5 months ago

Gave some feedback: Has some problems