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.

With Hints – Content covered F 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

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. 5 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?

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. 5 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

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. 5 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?

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?

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?

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.

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.

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.