A great tool to use for mathematics is the website Khan Academy. Here you may find many videos to help learn new ideas or to refresh previous ones.
Below are some videos I have selected that will move along with our curriculum.
Algebra Review
Solving Systems of Equations - Elimination
Solving Systems of Equations - Substitution
Multiplying Binomials (FOIL Method)
Factoring Quadratics When the Leading Number is Greater Than 1
Finding a Linear Equation Given a Point and Slope
Finding the Equation of a Line When Given Two Points
Chapter 1:
Constructing a Perpendicular Bisector
Constructing a Perpendicular Line
Constructing an Angle Bisector
Constructing a Perpendicular Line from an external point