I'm seeing a massive disparity between schools in their approach to delivering the A-Level Spec.
Today, I learned that a very experienced Head of Maths had chosen to do Integration by substitution, before finishing differentiation at y13.
Also today, a different school 2nd in dept chose to differentiate sin(x) 'from 1st principles' before even discussing addition/dbl angle formulae.
So, if you are, or were to be, employed as Head of Maths in a school, what would be your preferred order?
Here's mine:
Surds & Indices [2 lessons]
Coord Geometry, not circles [2 lessons]
Quads [8 lessons]
Function Transforms & sketching [2 lessons]
Circles [2 lessons]
Diff from 1st principles [2 lessons]
Diff of polynomials [3 lessons]
Binomial expansion, factorials, Pascal's triangle [4 lessons]
APs [2 lessons]
Trig : Radians, formulae for sectors, Sine & Cosine rules & "half absinC"
[3 lessons]
Trig : graphs & transforms, simple identities & solving eqns [4 lessons]
Integration [3 lessons]
Logs & exponentials [4 lessons]
GPs [3 lessons]
Binomial Expansion (-ve & fractional indices) [2 lessons]
Partial Fractions [2 lessons]
Other Sequences & recurrence relationships, Sigma notation [2 lessons]
Trig: sec, cosec & cot: graphs & identities [2 lessons]
Trig: addition & dbl angle formulae [3 lessons]
Trig: Harmonic formulae {Rcos(theta minus alpha)} [2 lessons]
Diff : sinx & cosx proofs from '1st principles' using small angle approximations & also using a squeeze [1 lesson]
Diff : Chain, Product & Quotient rules [3 lessons]
Diff : generate diff results for tan, sec, cosec & cot [1 lesson]
Diff: Implicit & Rates [2 lessons]
Iteration : Newton-Raphson [1 lesson]
Functions: Transformations involving stretch & translate in same & both directions, NB transforms of trig graphs especially to explain/discuss Rcos(theta minus alpha) [2 lessons]
Functions: Modulus, graph & transform & solve eqn [2 lessons]
Functions: mappings, domain & range, combinations, inverses, solving [3 lessons]
Integration : All 11 sub-topics [8 lessons]
Parametrics : cartesian equivalents, diff, integrations [3 lessons]
Vectors : 2D, 3D, parallel, perpendicular, angle between, vector algebra, magnitude, dot & cross products & their relationship to tan(y/x) and cosine rule, line equations, area formulae incl. matrix result for parallelogram, simple eqns of plane & normals [6 lessons]
Total : 90 lessons.
ONLY THEN would I start Mech & Stats. 32- 40 lessons (16 -20 each)
Plenty of space in a 72-week course in which to fit in topic tests, end of year test (in July, not before) & 2 mocks in y13 (BEFORE Christmas, and again after Feb half term). Also space left to do some extra things, like a trip, a few investigations, a bit of history of maths incl some notable historic maths figures/characters (not so much Newton! he has a bad rep!), but Euler, Eratosthenes, Euclid, Andrew Wiles, Pascal, Toricelli & his relationship to Galileo & Mersenne, Gauss, Bernouilli (most of the family! & their relationship to Eurler), Sophie Germain, Descartes, Hilbert.