PILOT OF A LINKED PAIR OF GCSEs in MATHEMATICS GCSE Applications of Mathematics Further notes on the Specification NOVEMBER 2013 Unit 1 & 2 - Further notes and examples Page 1 Page 2 PILOT OF A LINKED PAIR OF GCSEs in MATHEMATICS GCSE Applications of Mathematics – Unit 1 Unit 1 - Further notes and examples Page 3 Number – Unit 1 FOUNDATION HIGHER Understand and use number operations and the relationships between them, including inverse operations and hierarchy of operation. Understand and use number operations and the relationships between them, including inverse operations and hierarchy of operations. Numbers and their representations including powers, roots, indices (integers). 8 = 2 3 , 32 = 2 5, 25 , 3 64 . Numbers and their representations including powers, roots, indices (integers, fractional and negative), and standard index form. 2 Simplify 81 , 8 3 . Use the concepts and vocabulary of factor (divisor), multiple, common factor, common multiple and prime number. Approximate to specified or appropriate degrees of accuracy including a given power of ten, number of decimal places and significant figures. Divide a quantity in a given ratio. Divide £1520 in the ratio 5 : 3 : 2. Use the concepts and vocabulary of factor (divisor), multiple, common factor, common multiple and prime number. Approximate to specified or appropriate degrees of accuracy including a given power of ten, number of decimal places and significant figures. Divide a quantity in a given ratio. Divide £1520 in the ratio 5 : 3 : 2. Page 4 FURTHER NOTES / CLARIFICATION Including BIDMAS. Including addition, subtraction, multiplication and division of whole numbers, decimals, fractions and negative numbers and place value. Foundation – Multiplying fractions with a whole number, simple multiplying of fractions. Including reciprocals. Including the terms product and sum. Including estimation. Including questions such as: White and black paint are mixed in the ratio 5:2 to make grey paint. How much black paint is mixed with 800ml of white paint? Questions regarding recipes could be asked. Measures – Unit 1 FOUNDATION HIGHER FURTHER NOTES / CLARIFICATION Standard metric units of length, mass and capacity. The standard units of time; the 12- and 24- hour clock. (The notation for the 12- and 24- hour clock will be 1:30 p.m. and 13:30.) Convert measurements from one unit to another. Convert measurements from one unit to another. The use of common measures of time, length, mass, capacity and temperature in the solution of practical problems. Knowledge and use of the relationship between metric units. Conversion between the following metric and Imperial units: km - miles; cm, m - inches, feet; kg - lb; litres - pints, gallons. Candidates will be expected to know and use the following approximate equivalences. 8km ≈ 5 miles; 1kg ≈ 2.2 lb; 1 litre ≈ 175 pints Interpret scales on a range of measuring instruments and recognise the inaccuracy of measurements. Understand and use bearings. Only three figures bearings will be used e.g. 009°, 065°, 237°. Interpret scales on a range of measuring instruments and recognise the inaccuracy of measurements. Understand and use bearings. Only three figures bearings will be used e.g. 009˚, 065˚, 237˚. Measure and draw lines and angles. Lengths are accurate to 2mm and angles accurate to 2°. Measure and draw lines and angles. Page 5 Compass points must not be used e.g. N 330 W Algebra – Unit 1 Manipulate algebraic expressions by collecting like terms, by multiplying a single term over a bracket, and by taking out common factors. Simplify 3a – 4b + 4a + 5b. Expand 7(x – 3). Simplify 2(3x – 1) – (x – 4). Simplify x(x – 1) + 2(x2 – 3). Factorise 6x + 4. HIGHER Manipulate algebraic expressions by collecting like terms, by multiplying a single term over a bracket, and by taking out common factors. Simplify 3a – 4b + 4a + 5b. Expand 7(x – 3). Simplify 2(3x – 1) – (x – 4). Simplify x(x – 1) + 2(x2 – 3). Factorise 6x + 4. Derive a formula, substitute numbers into a formula. Wage earned = hours worked rate her hour. Find the wage earned if a man worked for 30 hours and was paid at the rate of £4.50 per hour. Derive a formula, substitute numbers into a formula. Wage earned = hours worked rate her hour. Find the wage earned if a man worked for 30 hours and was paid at the rate of £4.50 per hour. Find the value of 6f + 7g when f = – 3 and g = 2. Find the value of 6f + 7g when f = – 3 and g = 2. Use the conventions for coordinates in the plane and plot points in all four quadrants. Recognise and plot equations that correspond to straight-line graphs in the coordinate plane. Use the conventions for coordinates in the plane and plot points in all four quadrants. Recognise and plot equations that correspond to straight-line graphs in the coordinate plane. Find approximate solutions of equations using graphical methods and systematic trial and improvement. Find, by trial and improvement, the solution of the equation x3 – 5x = 80 which lies between 4 and 5. Give your answer correct to 1 decimal place. Find approximate solutions of equations using graphical methods and systematic trial and improvement. Find, by trial and improvement, the solution of the equation x3 – 5x = 80 which lies between 4 and 5. Give your answer correct to 1 decimal place. FOUNDATION Page 6 FURTHER NOTES / CLARIFICATION The examples listed in the previous column are skills needed by candidates. The questions assessing these skills will be set in real-life contexts. e.g. Owen has a pile of 5 pence and 10 pence coins. He counts the number of 10 pence coins and finds that he has x of them. (a) Write down, in terms of x, the total value of 10 pence coins. (b) Owen has four more 5 pence coins than 10 pence coins. Write down, in terms of x, how many 5 pence coins he has. (c) Write down, in terms of x, the total value of 5 pence coins. (d) Write down, in terms of x, the total value of all the coins that Owen has. You must simplify your answer as far as possible. Including deriving expressions e.g. Boxes of sweets each contain 2x – 3 sweets. Aled buys 6 boxes and Yasmin buys 9 boxes of sweets. Write down an expression, in terms of x, for the total number of sweets bought by Aled and Yasmin. Including function machines. Sometimes the interval in which the solution lies will not be given. Further examples – When the stone has been in the air for t seconds, its height above sea level, h metres, is given by h = 24t – 5t2 + 50. Complete the table of values, draw the graph and write down the times when the stone is 10 metres above the cliff. Algebra – Unit 1 FOUNDATION Find and interpret gradients and intercepts of straight line graphs in practical contexts. Construct linear functions from real-life problems and plot their corresponding graphs. e.g. conversion graphs. HIGHER Find and interpret gradients and intercepts of straight line graphs in practical contexts. Construct linear, quadratic and other functions from real-life problems and plot their corresponding graphs. e.g. conversion graphs. Interpret the gradient at a point on a curve as the rate of change. Recognise and use graphs that illustrate direct proportion.e.g. conversion graphs. Discuss, plot and interpret graphs (which may be non-linear) modelling real situations, including journeys / travel graphs. Recognise and use graphs that illustrate direct and inverse proportion. e.g. conversion graphs. Discuss, plot and interpret graphs (which may be non-linear and/or periodic) modelling real situations, including journeys / travel graphs. Page 7 FURTHER NOTES / CLARIFICATION Including travel graphs. Some useful resources http://www.cimt.plymouth.ac.uk/projects/mepres/ale vel/pure_ch8.pdf Geometry – Unit 1 FOUNDATION HIGHER Recall and use properties of angles at a point, angles at a point on a straight line (including right angles), perpendicular lines, and vertically opposite angles. Recall and use properties of angles at a point, angles at a point on a straight line (including right angles), perpendicular lines, and vertically opposite angles. Understand and use the angle properties of parallel and intersecting lines, triangles and quadrilaterals. Understand and use the angle properties of parallel and intersecting lines, triangles and quadrilaterals. Recall the properties and definitions of special types of quadrilateral, including square, rectangle, parallelogram, trapezium, kite and rhombus. Recall the properties and definitions of special types of quadrilateral, including square, rectangle, parallelogram, trapezium, kite and rhombus. Use 2D representations of 3D shapes. Use 2D representations of 3D shapes. Use and interpret maps and scale drawings Use and interpret maps and scale drawings. Draw triangles and other 2D shapes using a ruler, pair of compasses and protractor. Draw triangles and other 2D shapes using a ruler, pair of compasses and protractor. Use straight edge and a pair of compasses to do constructions. Use straight edge and a pair of compasses to do constructions. Construct loci. Estimate areas of irregular shapes. Calculate perimeters and areas of shapes made from triangles and rectangles. Find circumferences of circles and areas enclosed by circles. FURTHER NOTES / CLARIFICATION Including reflection and rotational symmetry Including knowledge of 3D shapes, nets, plans and elevations. Scales may be written in the form 1cm represents 5m or 1:500 Including quadrilaterals and circles. Including bisecting lines and angles. Constructing angles of 60, 30, 90 and 45. Candidates will be asked to show their construction lines. Constructing the locus of a point which moves such that it is (i) a given distance from a fixed point or line, Construct loci. (ii) equidistant from two fixed points or lines. Solving problems involving intersecting loci in two dimensions. Estimate areas of irregular shapes and areas under Higher - including use of the Trapezium rule or curves. methods of splitting the area from first principles. Calculate perimeters and areas of shapes made Including perimeters and areas of squares, from triangles and rectangles and other shapes. rectangles, triangles, parallelograms, trapezium and composite shapes. Including surface area Find circumferences of circles and areas enclosed To include shapes made from semicircles and by circles. quarter circles and reverse problems. Higher - to include area of sectors and segments. Page 8 Statistics and Probability – Unit 1 FOUNDATION Understand and use the vocabulary of probability and the probability scale. Understand and use theoretical models for probabilities including the model of equally likely outcomes. Understand and use estimates of probability from relative frequency. HIGHER Understand and use the vocabulary of probability and the probability scale. Understand and use theoretical models for probabilities including the model of equally likely outcomes. Understand and use estimates of probability from relative frequency. FURTHER NOTES / CLARIFICATION Including expected values Including knowledge of the cycle: Understand and use the statistical problem solving process/handling data cycle. Understand and use the statistical problem solving process/handling data cycle. Useful resource http://www.censusatschool.org.uk/resources/relevant-aengaging-stats/257-chap1 The term ‘hypothesis’ Higher - discuss sampling methods (candidates’ will not be expected to generate samples by using various methods e.g. stratified sampling, however, they should be aware of the need for sampling Awareness of bias. Design an experiment or survey, identifying possible sources of bias. Design an experiment or survey, identifying possible sources of bias. Produce and interpret diagrams for grouped discrete data and continuous data, including histograms with unequal class intervals. Page 9 Statistics and Probability – Unit 1 FOUNDATION HIGHER FURTHER NOTES / CLARIFICATION Produce and use cumulative frequency graphs and box-and-whisker plots. Work with time series, including their graphical representation. Calculate the median, mean, range, mode and modal class. Understand that when a statistical experiment or survey is repeated there will usually be different outcomes, and that increasing sample size generally leads to better estimates of probability and population characteristics. Discuss and start to estimate risk. Work with time series and moving averages, including their graphical representation. Scale will not always be included. Understand and use the term ‘skew’. Including comparing distributions using box-andwhisker plots Plot, interpret time series graphs. Higher – Calculate, plot and interpret moving averages. Plotting and interpreting trend lines Calculate, and for grouped data estimate, median, mean, range, quartiles and inter-quartile range, mode and modal class. Understand that when a statistical experiment or survey is repeated there will usually be different outcomes, and that increasing sample size generally leads to better estimates of probability and population characteristics. Discuss and start to estimate risk. Page 10 Understanding risk as a measure of the uncertainty of an event with its utility or consequences. Useful resources – http://understandinguncertainty.org/ http://understandinguncertainty.org/node/604 http://www.bowland.org.uk/case_studies/how_risky _is_life/start.htm PILOT OF A LINKED PAIR OF GCSEs in MATHEMATICS GCSE Applications of Mathematics Unit 2 Further notes on the Specification Unit 2 - Further notes and examples Page 11 Number – Unit 2 FOUNDATION Understand and use number operations and the relationships between them, including inverse operations and hierarchy of operations. Approximate to specified or appropriate degrees of accuracy including a given power of ten, number of decimal places and significant figures. Understand that 'percentage' means 'number of parts per 100' and use this to compare proportions. Use multipliers for percentage change. HIGHER Understand and use number operations and the relationships between them, including inverse operations and hierarchy of operations. Standard index form. Approximate to specified or appropriate degrees of accuracy including a given power of ten, number of decimal places and significant figures. Understand and use upper and lower bounds. The lower and upper bounds of 140 (to the nearest 10) are 135 and 145 respectively. FURTHER NOTES / CLARIFICATION Including whole numbers, decimals, fractions and negative numbers and understanding place value. Including BIDMAS. Foundation – Multiplying fractions with a whole number, simple multiplying of fractions. With positive and negative powers of 10. Including estimation. Including calculating the upper and lower bounds in calculations involving addition, subtraction, multiplication and division of numbers expressed to given degrees of accuracy. Understand that 'percentage' means 'number of parts per 100' and use this to compare proportions. Use multipliers for percentage change; work with repeated percentage change; solve reverse percentage problems. Given that a meal in a restaurant costs £36 with VAT at 17·5%, its price before the VAT is calculated as £ 36 . 1 175 Interpret fractions, decimals and percentages as operators. Find proportional change. Understand and use direct and proportion. Use calculators effectively and efficiently, including statistical functions. Interpret fractions, decimals and percentages as operators. Find proportional change and repeated proportional change. Exponential growth/decay, its relationship with repeated proportional change including financial and scientific applications. Understand and use direct and inverse proportion. Use calculators effectively and efficiently, including trigonometrical and statistical functions. Page 12 Including equivalences between decimals, fractions, ratios and percentages. Including compound interest and depreciation. Financial and Business Applications – Unit 2 FOUNDATION Carry out calculations relating to enterprise, saving and borrowing, appreciation and depreciation. The value of a car is £12,000. Each year its value decreases by 10%. Find the value of the car at the end of three years. Use mathematics in the context of personal and domestic finance including loan repayments, budgeting, RPI and CPI, exchange rates and commissions. e.g. fuel and other fuel bills, hire purchase, VAT, taxation, discount, best buys, wages and salaries. HIGHER Carry out calculations relating to enterprise, saving and borrowing, appreciation and depreciation and understand AER. The value of a car is £12,000. Each year its value decreases by 10%. Find the value of the car at the end of three years. Use mathematics in the context of personal and domestic finance including loan repayments, budgeting, RPI and CPI, exchange rates and commissions. FURTHER NOTES / CLARIFICATION Language and concepts at Foundation & Higher Tier Basic ideas of banking – savings, including maintaining a simple 3 column bank account sheet Bank account, credit, debit, balance, withdrawal, deposit, brought forward, carried forward Investment – savings and investments – how they grow. Investment, interest rate, compound interest, simple interest, per annum, loan, gross rate, net rate Personal Finance – basic money management, buying using a credit plan, wages and tax. Rent, (electricity) bill, credit plan, timesheet, basic rate, overtime rate, tax free, tax rate, income tax, taxable pay, household budget, repayments Enterprise - basic money management, depreciation of equipment, as personal finance Depreciation, VAT, expenses, commission, profit Currency transactions - changing sterling into a foreign currency and vice versa. Exchange, price comparisons, commission Comparison of ‘true’ price by converting to a common currency. Inflation calculating the effect of inflation on prices and wages Inflation, index number, cost of living (index), base year. Language and concepts at Higher Tier Issues are those given at Foundation tier with the following additions Investment Principal, AER, Mortgage Compound interest The AER formulae will be given. Inflation - calculating the effect of inflation on prices and wages Retail Price Index (RPI), Consumer Price Index (CPI) Questions will not be set which require and knowledge of the difference between the two indices. Page 13 Use spreadsheets to model financial, statistical and other numerical situations. Use spreadsheets to model financial, statistical and other numerical situations. Construct and use flow charts. Construct and use flow charts. Basic spreadsheet formula notation. Use BIDMAS e.g. =A2+B2 =B2-A2 =A2*B2 =A2*5 + B3*8 =sum(A2:..) =Average(A2:..) The following flowchart notation should be used. to indicate the flow process input/ output a rounded rectangle for start/stop decision box Candidates should construct the most efficient flowchart. Page 14 Measures – Unit 2 FOUNDATION Convert measurements from one unit to another. HIGHER Convert measurements from one unit to another. Make sensible estimates of a range of measures. Make sensible estimates of a range of measures. Understand and use compound measures in familiar contexts. Understand and use compound measures in familiar and unfamiliar contexts. Page 15 FURTHER NOTES / CLARIFICATION Standard metric units of length, mass and capacity. The standard units of time; the 12- and 24- hour clock. (The notation for the 12- and 24- hour clock will be 1:30 p.m. and 13:30.) The use of common measures of time, length, mass, capacity and temperature in the solution of practical problems. Knowledge and use of the relationship between metric units. Conversion between the following metric and Imperial units: km - miles; cm, m - inches, feet; kg - lb; litres - pints, gallons. Candidates will be expected to know and use the following approximate equivalences. 8km ≈ 5 miles; 1kg ≈ 2.2 lb; 1 litre ≈ 175 pints Use compound measures including speed and density. Use of compound measures such as m/s, km/h, mph, mpg, kg/m3, g/cm3 Algebra – Unit 2 FOUNDATION Set up, and solve simple equations and inequalities The angles of a quadrilateral are x˚, 49˚, 3x˚ and 111˚.Form an equation in x, and use your equation to find the value of x. Three times a number n plus 6 is less than 27. Write down an inequality which is satisfied by n and rearrange it in the form n < a where a is a rational number. Solve x + 6 = 15, 12 , x 12 x , 3 3 5x + 2 = 17, 10x + 9 = 6x + 11, 3(1 – x) = 5(2 + x), (x – 1) = 3x + 1. Solve linear inequalities in one variable, and represent the solution set on a number line. Solve 3x + 1 7. Solve 4 – x 5. HIGHER Set up, and solve simple equations and inequalities. Three times a number n plus 6 is less than 27. Write down an inequality which is satisfied by n and rearrange it in the form n < a where a is a rational number. Solve FURTHER NOTES / CLARIFICATION At Foundation candidates will be required to solve simple linear inequalities with whole numbers and fractional coefficients. x + 6 = 15, 12 , x 12 x , 3 3 5x + 2 = 17, 10x + 9 = 6x + 11, 3(1 – x) = 5(2 + x), (x – 1) = 3x + 1. Solve 3x + 1 7. Solve 4 – x 5. Solve linear inequalities in one or two variables, and represent the solution set on a number line or suitable diagram. Set up and solve problems in linear programming, finding optimal solutions. Set up and solve linear simultaneous equations in two unknowns. Page 16 Higher - including the use of straight line graphs to locate regions given by linear inequalities. Candidates may be required to set up the inequalities required from the question, locate regions and find optimal solutions. Candidates may be required to set up the equations using given information. Both equations may be of the form ax + by = c Geometry – Unit 2 FOUNDATION HIGHER Recognise reflection and rotation symmetry of 2D shapes. Recognise reflection and rotation symmetry of 2D shapes. Understand congruence and similarity, including the relationship between lengths, in similar figures. Understand congruence and similarity, including the relationship between lengths, areas and volumes in similar figures. Use Pythagoras’ theorem in 2D. Use Pythagoras’ theorem in 2D and 3D. Distinguish between centre, radius, chord, diameter, circumference, tangent, arc, sector and segment. Calculate perimeters and areas of shapes made from triangles and rectangles. Use the trigonometric ratios to solve 2D and 3D problems. Distinguish between centre, radius, chord, diameter, circumference, tangent, arc, sector and segment. Calculate perimeters and areas of shapes made from triangles and rectangles and other shapes. Calculate volumes of right prisms and of shapes made from cubes and cuboids. Calculate volumes of right prisms and of shapes made from cubes and cuboids. Solve mensuration problems involving more complex shapes and solids. Page 17 FURTHER NOTES / CLARIFICATION Simple description of symmetry in terms of reflection in a line/plane or rotation about a point. Order of rotational symmetry. Including reverse problems e.g. proving that a triangle is right angled. Calculating a side or an angle of a right-angled triangle. Including angles of elevation and depression. Including perimeters and areas of squares, rectangles, triangles, parallelograms, trapezium, and composite shapes. Including surface area Including the area of circles, semicircles quarter circles Higher – to include the area of sectors and segments Including volumes of spheres, hemispheres, cylinder, cone, truncated cone (frustum) and pyramids. Statistics and Probability – Unit 2 FOUNDATION HIGHER Design data-collection sheets distinguishing between different types of data. Design data-collection sheets distinguishing between different types of data. Extract data from publications, charts, tables and lists. Extract data from publications, charts, tables and lists. Design, use and interpret two-way tables for discrete and grouped data. Look at data to find patterns and exceptions. Compare distributions and make inferences. Design, use and interpret two-way tables for discrete and grouped data. Look at data to find patterns and exceptions. Compare distributions and make inferences Produce and interpret charts and diagrams for categorical data including bar charts, pie charts and pictograms. Produce and interpret diagrams for ungrouped discrete numerical data, including vertical line charts and stem-and-leaf diagrams. Recognise correlation and draw and/or use lines of best fit by eye, understanding and interpreting what these represent, and appreciating that correlation does not imply causality. Discuss and start to estimate risk. FURTHER NOTES / CLARIFICATION Including use of the range, mode and median. Including using/calculating of the mean, range, mode and median. Produce and interpret charts and diagrams for categorical data including bar charts, pie charts and pictograms. Produce and interpret diagrams for ungrouped discrete numerical data, including vertical line charts and stem-andleaf diagrams. Including use of the range, mode, median and modal group when interpreting stem-and-leaf diagrams. Recognise correlation and draw and/or use lines of best fit by eye, understanding and interpreting what these represent, and appreciating that correlation does not imply causality. Including plotting and interpreting scatter graphs Discuss and start to estimate risk. Understanding risk as a measure of the uncertainty of an event with its utility or consequences. Useful resources – http://understandinguncertainty.org/ http://understandinguncertainty.org/node/604 http://www.bowland.org.uk/case_studies/how_risky_is_lif e/start.htm Page 18