1. The question with hints
Optional hints help students progress through a multi-step exam-style question
The question with hints
The solution
For student peer or self-marking
Use:
with ‘Hints for printing’ when different hints are required for different students
when a worksheet is needed
when hints are no longer required
to focus on QWC
Your turn
Hints for printing
Use with ‘Your turn’ when different hints are required for different students
Marking exercise
Mark this wrong answer using the mark scheme on ‘The Solution’ slide
Feedback
Provides correct marking and possible feedback for the ‘Marking Exercise’
Reflection
Students can assess what they still need to learn and the grade they are working at.
Content covered
Test yourself cards
Print so students can learn the key points. Take home or work in pairs.

2. With Hints – Content coveredF
Percentages
Understand that percentages mean hundredths E
Calculation
Break a complex calculation into simpler steps D
Decimals
Multiply and divide decimals by whole numbers
Calculate percentages of an amount C
Multiply and divide numbers by multiples of powers of 10
Calculate percentage increase and decrease
Reflection

3. Sharpshop Spaghetti hoops
Hints and their solutions can be revealed as needed by clicking on the appropriate box. (A hard copy may be useful for reference during the lesson)
With Hints – The question with hints
5 marks
What is 40% of 60p?
Don wants to buy 12 tins of spaghetti hoops . Two supermarkets have these special offers.
Which is cheaper?
You must show your working marks
0.4 x 60p = 24p
What is the offer price per tin at Sharpshop?
Sharpshop
Spaghetti hoops
Normal price 60 p
Special offer
40 % off all tins
Lowprice
Spaghetti hoops
Normal price 56 p
Special offer
Buy 2 tins get 1 free
60p – 24p = 36p
What is the cost of 12 tine at Sharpshop?
12 x 36p = £4.32
How many tins must he buy at Lowprice?
8 tins
What does he pay to get 12 tins at Lowprice?
8 x 56p = £4.48
Which is less?

4. With Hints – The solution
Three kinds of marks can be given:
B for something being correct, irrespective of method
M for carrying out a correct step
A for a correct answer
Don wants to buy 12 tins of spaghetti hoops . Two supermarkets have these special offers.
Which is cheaper?
You must show your working marks
Reduction at Sharpshop = 0.4 x 60p
= 24p
Offer price at Sharpshop = 60p – 24p
= 36p
Cost of 12 tins at Sharpshop = 12 x 36p
= £4.32
No. of tins to buy at Lowprice = ⅔ of 12
= 8 tins
Cost of those tins = 8 x 56p
= £4.48
So Sharpshop is cheaper at £4.32 M
Sharpshop
Spaghetti hoops
Normal price 60 p
Special offer
40 % off all tins A
Lowprice
Spaghetti hoops
Normal price 56 p
Special offer
Buy 2 tins get 1 free B M B

5. How could you make this question harder?
With Hints – Your turn
Don wants to buy 12 tins of spaghetti hoops . Two supermarkets have these special offers.
Which is cheaper?
You must show your working marks
Write out your own solution to the question.
Explain each step carefully.
Sharpshop
Spaghetti hoops
Normal price 60 p
Special offer
40 % off all tins
Lowprice
Spaghetti hoops
Normal price 56 p
Special offer
Buy 2 tins get 1 free
How could you make this question harder?

6. With Hints – Hints for printing
What is 40% of 60p?
What is 40% of 60p?
What is the offer price per tin at Sharpshop?
What is the offer price per tin at Sharpshop?
What is the cost of 12 tine at Sharpshop?
What is the cost of 12 tine at Sharpshop?
How many tins must he buy at Lowprice?
How many tins must he buy at Lowprice?
What does he pay to get 12 tins at Lowprice?
What does he pay to get 12 tins at Lowprice?
Which is less?
Which is less?

7. With Hints - Marking exercise
Don wants to buy 12 tins of spaghetti hoops . Two supermarkets have these special offers.
Which is cheaper?
You must show your working.
5 marks
Mark this answer
Offer price at Sharpshop = 24p
Cost of 12 tins at Sharpshop = 12 x 24p
= £2.88
No. of tins to buy at Lowprice = 12
Cost of those tins = 12 x 56p
= £6.72
So Sharpshop is cheaper at £2.88
Sharpshop
Spaghetti hoops
Normal price 60 p
Special offer
40 % off all tins
Lowprice
Spaghetti hoops
Normal price 56 p
Special offer
Buy 2 tins get 1 free
What feedback would you give this person?

8. With Hints – Feedback M A B M B
Don wants to buy 12 tins of spaghetti hoops . Two supermarkets have these special offers.
Which is cheaper?
You must show your working.
Offer price at Sharpshop = 24p
Cost of 12 tins at Sharpshop = 12 x 24p
= £2.88
No. of tins to buy at Lowprice = 12
Cost of those tins = 12 x 56p
= £6.72
So Sharpshop is cheaper at £2.88 M A
Sharpshop
Spaghetti hoops
Normal price 60 p
Special offer
40 % off all tins B
Lowprice
Spaghetti hoops
Normal price 56 p
Special offer
Buy 2 tins get 1 free M B
Read the question carefully –
of is not the same as off.
Check that your answer is sensible –
would there really be that much difference?
Examiner note:
Many candidates confuse ‘of’ with ‘off’
Showing the working meant that the M mark could be awarded.

9. F D D C C    With Hints – Reflection I Can
Click below the button to reveal the grades
I Can   
Understand that percentages mean hundredths
Multiply and divide decimals by whole numbers
Calculate percentages of an amount
Multiply and divide numbers by multiples of powers of 10
Calculate percentage increase and decrease F D D C C
Self assess
Find or write some evidence to support your assessment
Write down your next steps
You may wish to use the Test Yourself cards.

10. With Hints – Test yourself cards
How do you add or subtract decimals?
How do calculate percentage change?
Line up the decimal points.
Form a fraction of the change over the original and convert to a percentage.
How do you change a decimal to a percentage?
How do you change a percentage to a decimal?
Multiply by 100.
Divide by 100.
What does per cent mean?
How do you calculate a percentage of an amount?
Out of 100.
Divide it by 100 then multiply by the percentage.
How do you multiply decimals?
How do you divide decimals?
Do the whole number version, then estimate the answer in order to put the decimal point in the right place.
These cards have
the things you may
need to learn in
order to do
Best buy questions.
Copy down the
ones YOU need or
ask your teacher
for a printout.