Sal works through 80 questions taken from the California Standards Test for Algebra II. Good place to review the major topics in Algebra II even if you're not in California. Many of these topics are taugt in more depth in the 'Algebra' playlist.
Arithmetic - 36 Lectures Available
The most basic of the math playlists. Start here if you have very little background in math fundamentals (or just want to make sure you do). After watching this playlist, you should be ready for the pre-algebra playlist.
Sal works through the problems from the CA Standards released questions:
http://www.cde.ca.gov/ta/tg/sr/documents/rtqalg1.pdf . Good videos to review Algebra I (The 'Algebra I Worked Examples' playlist is more comprehensive and should probably be watched first).
Pre-algebra - 23 Lectures Available
Videos on pre-algebra. Should be ready for the 'Algebra' playlist if you understand everything here.
Introduction to Linear Dynamical Systems (EE263) is the introduction to applied linear algebra and linear dynamical systems, with applications to circuits, signal processing, communications, and control systems. Topics include: Least-squares approximations of over-determined equations and least-norm solutions of underdetermined equations. Symmetric matrices, matrix norm and singular value decomposition. Eigenvalues, left and right eigenvectors, and dynamical interpretation. Matrix exponential, stability, and asymptotic behavior.
Videos on trigonometry. Watch the 'Geometry' playlist first if you have trouble understanding the topics covered here.
Topics covered in a first year course in differential equations. Need to understand basic differentiation and integration from Calculus playlist before starting here.
Geometry - 11 Lectures Available
Videos on geometry. Basic understanding of Algebra I necessary. After this, you'll be ready for Trigonometry.
Precalculus - 13 Lectures Available
Non-trigonometry pre-calculus topics. Solid understanding of all of the topics in the 'Algebra' playlist should make this playlist pretty digestible.