Year 9 Mathematics Number Types 4 operations, directed number, LCM/HCF, prime factors, inverse operations. Fractions Order fractions, use all 4 operations, mixed/improper and problem solving. Ratio and Proportion Link to fractions, simplifying, sharing, multiplicative relationship, graphically. Proportion. Percentages Basic percentage, percentage change, increase/decrease, reverse and simple interest and intro to percentage multipliers. ASSESSMENT 1 Estimating and Approximating Rounding to decimal places/significant figures, bounds and error interval. Algebraic Expressions All notation, simplifying, basic expanding and common factors. Solving Equations and Formulae Substitution, Solve equations including unknowns on both sides, change subject of formulae. Sequences nth terms of linear sequences. Recognise Fibonacci, quadratic and geometric sequences. Linear Graphs and Coordinates Plot y = mx + c, identify parallel lines, explore gradients, draw other graphs. ASSESSMENT 2 Perimeter and Area Perimeter and Area of all shapes, including circles. Higher: including sectors and arc lengths. Volume Volumes of prisms, cones, spheres and pyramids. ASSESSMENT 3 Collecting and Representing Data and Averages Pie charts, stem and leaf, two way tables, time series. Calculate the three averages, compare using average and spread. Scatter Graphs Use and interpret, recognise correlation, make predictions. Indices Calculate using indices, use index laws including negative and fractional indices. Standard Form Place value, calculate and interpret standard form (calculator and non-calculator). ASSESSMENT 4 Probability All probability. Single events, combined events, relative frequency, tree diagrams, conditional probability, Venn diagrams Angles All notation, at a point, straight line, vertically opposite and with parallel lines. Properties of Polygons Special quadrilaterals, angles in polygons, exterior and interior. Transformations Reflect, rotate, translate and enlarge (positive and negative scale factors).