**D/1**Use the equivalence of fractions, decimals and percentages to compare proportions

- http://www.khanacademy.org/math/arithmetic/fractions/e/ordering_numbers
- http://www.khanacademy.org/math/arithmetic/percents/e/converting_percents_to_decimals
- http://www.khanacademy.org/math/arithmetic/percents/e/converting_percents_to_decimals
- http://www.khanacademy.org/math/arithmetic/fractions/e/converting_decimals_to_fractions_1
- http://www.khanacademy.org/math/arithmetic/fractions/e/converting_fractions_to_decimals

**D/2**Calculate percentages and find the outcome of a given percentage increase or decrease

**D/3**Divide a quantity into two or more parts in a given ratio and solve problems involving ratio and direct proportion

**D/4**Use proportional reasoning to solve a problem, choosing the correct numbers to take as 100%, or as a whole

**D/5**Add and subtract fractions by writing them with a common denominator, calculate fractions of quantities (fraction answers), multiply and divide an integer by a fraction

- http://www.khanacademy.org/math/arithmetic/fractions/e/adding_fractions_with_common_denominators
- http://www.khanacademy.org/math/arithmetic/fractions/e/subtracting_fractions_with_common_denominators
- http://www.khanacademy.org/math/arithmetic/fractions/e/adding_fractions
- http://www.khanacademy.org/math/arithmetic/fractions/e/subtracting_fractions

**D/6**Use systematic trial and improvement methods and ICT tools to find approximate solutions to equations such as x³ + x = 20

**D/7**Construct and solve linear equations with integer coefficients, using an appropriate method

- http://www.khanacademy.org/math/algebra/solving-linear-equations-and-inequalities/e/evaluating_expressions_1
- http://www.khanacademy.org/math/algebra/solving-linear-equations-and-inequalities/e/writing_expressions_1

**D/8**Generate terms of a sequence using term-to-term and position-to-term definitions, on paper and using ICT; write an expression to describe the nth term of a sequence

**D/9**Plot the graphs of linear functions, where y is given explicitly in terms of x; recognise that equations of the form y = mx + c correspond to straight-line graphs

- http://www.khanacademy.org/math/algebra/linear-equations-and-inequalitie/e/slope_of_a_line
- http://www.khanacademy.org/math/algebra/linear-equations-and-inequalitie/e/interpreting_linear_equations
- http://www.khanacademy.org/math/algebra/linear-equations-and-inequalitie/e/solving_for_the_y-intercept
- http://www.khanacademy.org/math/algebra/linear-equations-and-inequalitie/e/solving_for_the_x-intercept
- http://www.khanacademy.org/math/algebra/linear-equations-and-inequalitie/e/slope_intercept_form
- http://www.khanacademy.org/math/algebra/linear-equations-and-inequalitie/e/line_graph_intuition
- http://www.khanacademy.org/math/algebra/linear-equations-and-inequalitie/e/plugging_in_values
- http://www.khanacademy.org/math/algebra/algebra-functions/e/identifying_points_2

**D/10**Construct functions arising from real-life problems and plot their corresponding graphs

**D/11**Interpret graphs arising from real situations

**D/12**Classify quadrilaterals by their geometric properties

**D/13**Solve geometric problems using properties of angles, of parallel and intersecting lines, and of triangles and other polygons

**D/14**Identify alternate and corresponding angles; understand a proof that the sum of the angles of a triangle is 180° and of a quadrilateral is 360°

- http://www.khanacademy.org/math/geometry/parallel-and-perpendicular-lines/e/parallel_lines_1
- http://www.khanacademy.org/math/geometry/parallel-and-perpendicular-lines/e/parallel_lines_2
- http://www.khanacademy.org/math/geometry/parallel-and-perpendicular-lines/e/alternate_interior_angles_2
- http://www.khanacademy.org/math/geometry/parallel-and-perpendicular-lines/e/alternate_exterior_angles_2
- http://www.khanacademy.org/math/geometry/parallel-and-perpendicular-lines/e/same_side_interior_angles_2
- http://www.khanacademy.org/math/geometry/parallel-and-perpendicular-lines/e/same_side_exterior_angles_2
- http://www.khanacademy.org/math/geometry/parallel-and-perpendicular-lines/e/corresponding_angles_2

**D/15**Devise instructions for a computer to generate and transform shapes and paths

**D/16**Visualise and use 2D representations of 3D objects

**D/17**Enlarge 2D shapes, given a centre of enlargement and a positive whole-number scale factor

**D/18**Know that translations and reflections preserve length and angle and map objects onto congruent images

**D/19**Use straight edge and compasses to do standard constructions

**D/20**Deduce and use formulae for the area of a triangle and parallelogram, and the volume of a cuboid; calculate volumes and surface areas of cuboids

- http://www.khanacademy.org/math/geometry/basic-geometry/e/area_of_triangles_1
- http://www.khanacademy.org/math/geometry/area--perimeter--and-volume/e/area_of_parallelograms

**D/21**Know and use the formulae for the circumference and area of a circle

- http://www.khanacademy.org/math/geometry/basic-geometry/e/area_of_a_circle
- http://www.khanacademy.org/math/geometry/basic-geometry/e/radius_diameter_and_circumference

**D/22**Design a survey/experiment to capture the necessary data from one/more sources; trial and refine data collection sheets; construct tables for large discrete and continuous sets of raw data, choosing suitable class intervals; design and use two-way tables

**D/23**Select, construct and modify, on paper/ICT: pie charts for categorical data; bar charts/ frequency diagrams for discreet/continuous data; simple time graphs for time series; scatter graphs, and identify which are the most useful in the context of the problem

**D/24**Find and record all possible mutually exclusive outcomes for single and two successive events in a systematic way

**D/25**Know that the sum of all mutually exclusive outcomes is 1 and use this when solving problems

**D/26**Communicate interpretations and results of a statistical survey using selected tables, graphs and diagrams in support