Solve the mystery

1. Line By Line Choose the activity(ies) that best suit your students’ learning needs Improve understanding of how marks are allocated by using the mark scheme to mark an incorrect solution . View on the IWB..Mark scheme can be printed as support. Unravel facts and questions to focus on stepping stones in a solution. Can be printed or viewed on the IWB Marking exercise Solve the mystery Focus on the links between the steps in a solution by ordering the steps . Can be printed or viewed on the IWB Improve understanding of how marks are allocated by using the mark scheme to mark a n incorrect solution. For printing. Mark scheme can be printed as support. Print marking exercise Put the steps in order Identify what is being calculated in each step . Can be printed or viewed on the IWB Practice putting together a concise, clear solution to an exam-style question. Can be printed or viewed on the IWB Focus on QWC Explain the steps Emphasise the importance of each step in a solution by writing a mark scheme. Students can assess their answer against the given mark scheme. Print or view on the IWB Reflection Write the mark scheme Students can assess what they still need to learn and the grade they are working at. Test yourself cards Print so students can learn the key points. Take home or work in pairs. Content covered

2. Line By Line – Content covered Reflection

3. Line By Line – Solve the mystery The cards give clues to help you solve a mystery. Some give information, others ask questions. Solve the mystery! Explain how you solved the mystery. Include the order in which you used the cards. This is an exam question. What do you think the question is?

4. Line By Line – Put the steps in order Mrs Davis is going to buy a new dishwasher. Three shops offer the model she wants. She decides she will buy the cheapest one out of these three offers. Work out which shop she should go to. Explain carefully how you came to your decision. 5 marks Temoc £345 plus VAT at 20% We’ll pay the VAT! Syrruc RRP of £420 25% off RRP Sogra £80 deposit 12 instalments of £25.50 These are the steps in the solution. Put them in order and explain what is happening in each step. Can you insert them into the ‘running order’ for the mystery cards?

5. Line By Line – Explain the steps Mrs Davis is going to buy a new dishwasher. Three shops offer the model she wants. She decides she will buy the cheapest one out of these three offers. Work out which shop she should go to. Explain carefully how you came to your decision. 5 marks Temoc £345 plus VAT at 20% We’ll pay the VAT! Syrruc RRP of £420 25% off RRP Sogra £80 deposit 12 instalments of £25.50 Explain the steps in the solution

6. Line By Line – Write the mark scheme Mrs Davis is going to buy a new dishwasher. Three shops offer the model she wants. She decides she will buy the cheapest one out of these three offers. Work out which shop she should go to. Explain carefully how you came to your decision. 5 marks Sogra, instalments = 12 x 25.50 = £306 Sogra total = 80 + 306 = £386 Syrruc reduction =420 x 0.25 = £105 Syrruc price = 420 – 105 = £315 Temoc unchanged = £345 £315 is the cheapest at Syrruc There are 5 marks. Write a mark-scheme. Temoc £345 plus VAT at 20% We’ll pay the VAT! Syrruc RRP of £420 25% off RRP Sogra £80 deposit 12 instalments of £25.50 What mistakes do you think people will make when doing this question? Answers

7. Line By Line – The mark scheme Sogra, instalments = 12 x 25.50 = £306 Sogra total = 80 + 306 = £386 Syrruc reduction =420 x 0.25 = £105 Syrruc price = 420 – 105 = £315 Temoc unchanged = £345 £315 is the cheapest at Syrruc Mrs Davis is going to buy a new dishwasher. Three shops offer the model she wants. She decides she will buy the cheapest one out of these three offers. Work out which shop she should go to. Explain carefully how you came to your decision. 5 marks Temoc £345 plus VAT at 20% We’ll pay the VAT! M A Syrruc RRP of £420 25% off RRP Sogra £80 deposit 12 instalments of £25.50 M B A

8. Line By Line – Marking exercise Mrs Davis is going to buy a new dishwasher. Three shops offer the model she wants. She decides she will buy the cheapest one out of these three offers. Work out which shop she should go to. Explain carefully how you came to your decision. 5 marks Sogra price = 12 x 25.50 = £306 Syrruc reduction =420 x 0.25 = £105 Syrruc price = 420 – 105 = £315 Temoc VAT = 0.2 x 345 = £69 Temoc price with VAT = 345 + 69 = £414 Temoc price, no VAT = £345 £306 is the cheapest at Sogra Mark this answer 0 Temoc £345 plus VAT at 20% We’ll pay the VAT! 0 Syrruc RRP of £420 25% off RRP 1 Sogra £80 deposit 12 instalments of £25.50 2/5 marks 1 0

9. Line By Line – Print marking exercise Mrs Davis is going to buy a new dishwasher. Three shops offer the model she wants. She decides she will buy the cheapest one out of these three offers. Work out which shop she should go to. Explain carefully how you came to your decision. 5 marks Sogra price = 12 x 25.50 = £306 Syrruc reduction =420 x 0.25 = £105 Syrruc price = 420 – 105 = £315 Temoc VAT = 0.2 x 345 = £69 Temoc price with VAT = 345 + 69 = £414 Temoc price, no VAT = £345 £306 is the cheapest at Sogra Mark this answer Temoc £345 plus VAT at 20% We’ll pay the VAT! Syrruc RRP of £420 25% off RRP Sogra £80 deposit 12 instalments of £25.50 /5 marks

10. Line By Line – Focus on QWC Mrs Davis is going to buy a new dishwasher. Three shops offer the model she wants. She decides she will buy the cheapest one out of these three offers. Work out which shop she should go to. Explain carefully how you came to your decision. 5 marks Syrruc RRP of £420 25% off RRP Sogra £80 deposit 12 instalments of £25.50 Temoc £345 plus VAT at 20% We’ll pay the VAT! Write out your solution to this question clearly and using correct mathematical statements. Ask another pupil in the class to give you feedback on it.

11. Line By Line – Reflection Click below the button to reveal the grades I can 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.

12. Line By Line – Test yourself cards 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.