**B/1**Understand the equivalence between recurring decimals and fractions

- http://www.khanacademy.org/math/algebra/systems-of-eq-and-ineq/e/converting_repeating_decimals_to_fractions_2
- http://www.khanacademy.org/math/algebra/systems-of-eq-and-ineq/e/converting_repeating_decimals_to_fractions_1

**B/2**Use fractions or percentages to solve problems involving repeated proportional changes or the calculation the original quantity given the result of a proportional change

**B/3**Solve problems involving calculating with powers, roots and numbers expressed in standard form, checking for correct order of magnitude and using a calculator as appropriate

- http://www.khanacademy.org/math/algebra/exponents-radicals/e/exponents_1
- http://www.khanacademy.org/math/algebra/exponents-radicals/e/scientific_notation_intuition
- http://www.khanacademy.org/math/algebra/exponents-radicals/e/square_roots
- http://www.khanacademy.org/math/algebra/exponents-radicals/e/cube_roots

**B/4**Factorise quadratic expressions including the difference of two squares

- http://www.khanacademy.org/math/algebra/quadtratics/e/solving_quadratics_by_factoring
- http://www.khanacademy.org/math/algebra/quadtratics/e/solving_quadratics_by_factoring_2

**B/5**Manipulate algebraic formulae, equations and expressions, finding and multiplying two linear expressions

**B/6**Derive & use more complex formulae and change the subject of the formula

**B/7**Evaluate algebraic formulae, substituting decimals, fractions and negative numbers

**B/8**Solve simultaneous equations algebraically and graphically

- http://www.khanacademy.org/math/algebra/systems-of-eq-and-ineq/e/systems_of_equations_with_elimination_0.5
- http://www.khanacademy.org/math/algebra/systems-of-eq-and-ineq/e/systems_of_equations_with_elimination
- http://www.khanacademy.org/math/algebra/systems-of-eq-and-ineq/e/systems_of_equations_with_substitution
- http://www.khanacademy.org/math/algebra/systems-of-eq-and-ineq/e/systems_of_equations
- http://www.khanacademy.org/math/algebra/systems-of-eq-and-ineq/e/systems_of_equations
- http://www.khanacademy.org/math/algebra/systems-of-eq-and-ineq/e/systems_of_equations_word_problems
- http://www.khanacademy.org/math/algebra/systems-of-eq-and-ineq/e/graphing_systems_of_equations

**B/9**Solve inequalities in two variables and find the solution set

**B/10**Sketch, interpret and identify graphs of linear, quadratic, cubes & reciprocal functions and graphs that model real life situations

**B/11**Understand the effect on a graph of addition of (or multiplication by) a constant

**B/12**Identify and specify coordinates in 3D

**B/13**Understand and use congruence and mathematical similarity

- http://www.khanacademy.org/math/geometry/congruent-triangles/e/congruent_triangles_1
- http://www.khanacademy.org/math/geometry/congruent-triangles/e/congruent_triangles_2
- http://www.khanacademy.org/math/geometry/similarity/e/similar_triangles_1
- http://www.khanacademy.org/math/geometry/similarity/e/similar_triangles_2
- http://www.khanacademy.org/math/geometry/similarity/e/solving_similar_triangles_1
- http://www.khanacademy.org/math/geometry/similarity/e/solving_similar_triangles_2

**B/14**Understand and use trigonometrical relationships in right angled triangles, and use them to solve problems, including those involving bearings

- http://www.khanacademy.org/math/trigonometry/e/trigonometry_0.5
- http://www.khanacademy.org/math/trigonometry/e/trigonometry_1
- http://www.khanacademy.org/math/trigonometry/e/trigonometry_1.5
- http://www.khanacademy.org/math/trigonometry/e/trigonometry_2

**B/15**Understand the difference between formulae for perimeter, area and volume in simple contexts by considering dimensions

**B/16**Estimate and find the median, quartiles and inter-quartile range for large data sets, including using a cumulative frequency diagram

**B/17**Compare two or more distributions and make inferences, using the shape of the distributions and measures of average and spread including median and quartiles

**B/18**Know when to add and when to multiply two probabilities

**B/19**Use tree diagrams to calculate probabilities of combinations of independent events