Revision – Show your working presentation for Maths
7
© Pearson Education 2010 Make your mark Showing your working There are lots of method marks available on your exam. You can get these by writing your answer clearly and showing all of your working. You can get method marks even if you don’t get the correct answer. When a question says “You must show your working” then you won’t get any marks if you just write the answer.
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Take a look at this free revision presentation for your maths students. This presentation aims to show the importance of ‘showing your working’ and helping your students understand why it’s so important. It provides: Some quick tips on showing your working, a summary of how AQA examiners award marks and a step-by step walk-through of a sample maths question. Ideal for revision – help your students get the grades they deserve.For more fantastic maths resources and the latest maths news, subscribe free to our blog here http://aqagcsemaths.wordpress.com/
Transcript of Revision – Show your working presentation for Maths
© Pearson Education 2010
Make your mark
Showing your working
There are lots of method marks available on your exam. You can get these by writing your answer clearly and showing all of your working.
You can get method marks even if you don’t get the correct answer.
When a question says “You must show your working” then you won’t get any marks if you just write the answer.
© Pearson Education 2010
Make your mark
Top tips for showing your workingYou need to use a blue or black pen in the exam. You can use a pencil for diagrams.
Start a new line of working for each new calculation.
Don’t ever rub or scribble anything out or use Tippex. If you make a mistake put a neat line through your work and carry on – you might still get some marks for it.
If you round an answer write down the degree of accuracy you have used.
Write down your calculations - if it’s worth typing into your calculator it’s worth writing on the exam paper.
© Pearson Education 2010
AQA GCSE mark schemesMethod marks (M) are awarded for a correct method, or an attempt to apply the correct mathematical technique.Accuracy marks (A) are awarded for an answer which follows on from a correct method.
Independent marks (B) are awarded for a correct answer or value regardless of method.
QWC marks (Q) are awarded for quality of written communication.
Follow through marks (ft) are awarded when a student uses an earlier incorrect value as part of a correct method.
© Pearson Education 2010
Make your mark
Let’s look at a grade D questionIn December 2008 the UK government reduced the price of VAT from 17.5% to 15%.
Jamie said that this means everything will be 2.5% cheaper.
Do you agree with Jamie’s statement?
You must show your working.
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© Pearson Education 2010
Make your mark
Let’s look at a grade D questionIn December 2008 the UK government reduced the price of VAT from 17.5% to 15%.
Jamie said that this means everything will be 2.5% cheaper.
Do you agree with Jamie’s statement?
You must show your working.
…………………………………………………………………………………………………………
…………………………………………………………………………………………………………
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…………………………………………………………………………………………………………
…………………………………………………………………………………………………………
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…………………………………………………………………………………………………………
……………………………………………………………………………………………... (3 marks)
M1
M0 Q0
(1 mark)
£100 + 17.5% = £100 + £17.50
= £117.50
£100 + 15% = £100 + £15
= £115
£117.50 – £115 = £2.50
Yes
Sample answer 1Sample answer 1
This student has chosen an amount and correctly calculated increases of 15% and 17.5%. However he has not attempted to calculate the difference in price as a percentage so he is not awarded the second method mark.
© Pearson Education 2010
Make your mark
Let’s look at a grade D questionIn December 2008 the UK government reduced the price of VAT from 17.5% to 15%.
Jamie said that this means everything will be 2.5% cheaper.
Do you agree with Jamie’s statement?
You must show your working.
…………………………………………………………………………………………………………
…………………………………………………………………………………………………………
…………………………………………………………………………………………………………
…………………………………………………………………………………………………………
…………………………………………………………………………………………………………
…………………………………………………………………………………………………………
…………………………………………………………………………………………………………
……………………………………………………………………………………………... (3 marks)
M0 M0 Q0
(0 marks)
No Jamie is wrong because it is after the
percentages have been added.
Sample answer 2Sample answer 2
This student has written the correct conclusion but hasn’t shown any working. He gets no marks.
© Pearson Education 2010
Make your mark
Let’s look at a grade D questionIn December 2008 the UK government reduced the price of VAT from 17.5% to 15%.
Jamie said that this means everything will be 2.5% cheaper.
Do you agree with Jamie’s statement?
You must show your working.
…………………………………………………………………………………………………………
…………………………………………………………………………………………………………
…………………………………………………………………………………………………………
…………………………………………………………………………………………………………
…………………………………………………………………………………………………………
…………………………………………………………………………………………………………
…………………………………………………………………………………………………………
……………………………………………………………………………………………... (3 marks)
(3 marks)
100 x 1.175 = 117.5
So £100 plus 17.5% VAT would be £117.50
100 x 1.15 = 11.5
So £100 plus 15% VAT would be £115
This means that after the VAT reduction
the item is £2.50 cheaper.
(2.5 ÷ 117.5) x 100% = 2.13% (2 d.p.)
Jamie is wrong… it is 2.13% cheaper.
Sample answer 3Sample answer 3
This student has achieved full marks. They have used the correct method for all their calculations and have written down all of their working clearly and logically.
M1
M1 Q1
