Khan Academy

FREE Exercise Software

Watch teaching videos

With over 2,400 videos covering everything from arithmetic to physics, finance, and history, Khan Academy can help your student learn whatever they want, whenever they want, at their own pace.

Practice concepts

The last time I checked out this site, they only had the free teaching videos available, but since then they have added 125 practice exercises to enable students to practice the concepts.

Parents can sign up also as coaches to track their students’ progress.

Topics currently available are:

• Maths

  • Developmental Maths
  • Pre Algebra
  • Algebra
  • Core Algebra
  • Geometry
  • Trigonometry
  • Probability
  • Statistics
  • Precalculus
  • Calculus
  • Differential Equations
  • Linear Algebra

 

• Science

  • Biology
  • Chemistry
  • Physics
  • Organic Chemistry
  • Cosmology & Astronomy
  • Computer Science

 

• History

• Finance

  • Core Finance
  • Banking & Money
  • Valuation & Investing
  • Venture Capital & Capital Markets
  • Credit Crisis
  • Paulson Bailout
  • Geithner Plan
  • Current Economics
  • Currency

 

• Test Prep

  • SAT Maths
  • GMAT
    • Problem Solving
    • Data Sufficiency
  • CAHSEE
  • Competition Maths
  • IIT JEE
  • Singapore Maths

Learn almost anything for free.