Here is an awesome resource for teachers and students! Khan Academy, a nonprofit global classroom for anyone in the world who has access to a computer, has a library of thousands of videos online that are free. This provides quality instruction to people all over the world, no matter where they are located. They also offer Teacher Resources as well. Here is an example of some of the topics they cover:

ALGEBRA (many lessons in each of these subtopics):

- Algebra Intro
- Linear Equations
- Inequalities
- Rations & Proportions
- Absolute Value
- Exponents and Radicals
- Logarithms
- Polynomials
- Quadratics
- Functions
- Conic Sections
- Complex Numbers
- Matrices

It’s easy to see by this listing that there are many lessons from which to choose. Here is a partial list of more topics without subtopics listed:

- American Civics
- Arithmetic & Pre-Algebra
- Art History (for many different eras)
- Astrology
- Banking & Money
- Biology
- Brain Teasers
- Cryptography
- Calculus
- Chemistry
- Differential Equations
- Economics
- Finance
- Geometry
- Healthcare & Medicine
- History
- Physics
- Statistics
- Trigonometry
- Computer Science

Khan Academy is a global classroom of students who learn at their own rate and choose what they want to study. Here are reviews and stories of the academy so you can read first hand from teachers and students all over the world.