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#### Arithmetic

The first math topic. Start here if you want to learn the basics (or just want to make sure you know these topics).

#### Pre-algebra

If you've mastered the basics of arithmetic and are ready to learn more about numbers and operations, you're in the right place!

#### Algebra I

Conceptual videos and worked examples from basic algebra.

#### Geometry

This is a first year, high-school level course on Geometry (which is based on Euclid's elements). It revisits many of the basic geometrical concepts studied in earlier courses, but addresses them with more mathematical rigor. There is strong focus on proving theorems and results from basic postulates.

#### Algebra II

Conceptual videos and worked examples from basic algebra through algebra 2. Includes videos from the former algebra worked examples playlists.

#### Trigonometry

Videos and exercises on trigonometry. Watch the "Geometry" playlist first if you have trouble understanding the topics covered here.

#### Multivariable calculus

Topics covered in the first two or three semesters of college calculus. Everything from limits to derivatives to integrals to vector calculus. Should understand the topics in the pre-calculus playlist first (the limit videos are in both playlists)

#### Differential equations

Topics covered in a first year course in differential equations. Need to understand basic differentiation and integration from Calculus playlist before starting here.

#### Linear algebra

Matrices, vectors, vector spaces, transformations, eigenvectors/values. Covers all topics in a first year college linear algebra course. This is an advanced course normally taken by science or engineering majors after taking at least two semesters of calculus (although calculus really isn't a prereq) so don't confuse this with regular high school algebra.