GCSE  AQA Link Paired Pilot Methods 2  Higher
Algebra topics from grade B to A*
A2b  Manipulate Algebraic expressions  Double brackets
This video goes through three different methods for expanding double brackets.
Interactive Practice from CIMT : Questions 511 Worked exam questions: RawMaths1 2 3 General Tutorial: maths247 Exam Solutions 

A2c  Manipulate Algebraic expressions  Factorising Quadratics
This video is a quick recap of factorising simple quadratics with single x squared term. There are a number of general tutorials below for this topic
that might give you more insight into this if this video doesnt remind you, I would specifically look at the maths247 harder one for a nice method for
expressions with a multiple x squared term.
Interactive Practice from CIMT : Lots of factorising Just Qu 2 General Tutorial: Exam solutions maths 247  basic maths247  harder jayates79 

A2d  Manipulate Algebraic expressions  Difference of two squares
This video from ExamSolutions gives a nice tutorial for this very specific method for factorising which is a very common exam question.
Worked exam questions: RawMaths1 2 

A2e  Manipulate Algebraic expressions  Simplifying rational expressions
This video by Exam Solutions goes through 4 examples of simplifying algebraic fractions, this is all about factorising the top and the bottom and then canceling them.
Worked exam questions: RawMaths1 2 

A4a  Solve quadratic equations exactly by factorising
This video by Exam Solutions is a nice demonstration of 5 examples of factorising to solve quadradic equations that is ones
where the highest power is a squared term. Essentially this is just the factorising from section A2, then making each bracket zero and solving.
Interactive Practice from CIMT : Questions 3 to 5 Worked exam questions: RawMaths1 2 3 

A4b  Solving quadratics by completing the square
This video from ExamSolutions goes through a few examples of completing the square whilst explaining what is going on.
Interactive Practice from CIMT : Completing the square questions Worked exam questions: Rawmaths1 2 Maths247 General Tutorial: maths247 

A4c  Solve quadratic equations by using the formula
This video from ExamSolutions gives a nice clear example of how to use the formula to solve a quadratic equation.
Worked exam questions: RawMaths 1 2 3 maths247 General Tutorial: Hegartymaths  Lots of Pratice maths247 

A6  Nth term of a quadratic sequence
This video recaps the method for finding the Nth term for a Quadratic sequences.
Interactive Practice from CIMT : Nth term of Quadratics Worked exam questions: RawMaths 2 3 General Tutorial: maths247 