The videos are intended mainly to help revise, but also to help catch up missed lessons.
The videos are not embedded, to speed up the page load speed and make it easier to navigate. Instead the links open a new page in YouTube (or similar).
Algebra
Man vs Maths Videos
These videos break down basically all the skills required at Year 9, except the skill of writing equations at Excellence level:Algebra Expressions (Achieved)
Adding and Subtracting (Achieved)
Like Terms (Achieved)
Multiplying (Achieved)
Dividing (Merit)
Expanding brackets (Achieved)
Simple Factorising (Achieved)
Complex Factorising (Merit)
Simplifying (Achieved and Merit)
Substitution (Achieved)
Solving One Step (Achieved)
Solving Two Step (Achieved and Merit)
Solving Three Step (Merit)
Layout of Solving (Merit)
Other
For those that want their explanations a bit slower, these are for solving from US teachers:Solving with plus and minus (Achieved)
Solving with times and divide (Achieved)
Two-step solving (Achieved)
Multi-step solving (Merit)
Geometry
Videos from MathsMasterOrg, a YouTube channel with a lot of good stuff.Angles around a point
Angles on a line
Vertically opposite angles
Angles in a triangle
Corresponding Angles
Alternate Angles
Cointerior Angles