There are several parents whose children cannot  rely on them for help with math, chemistry, physics, or other related subjects. These parents resort to hiring tutors, which can be expensive. A better alternative would be online learning or e-learning. So where can you look for the best resource? We suggest you consider using the source Bill Gates and his children use: the Khan Academy.

Salman Khan, a former hedge fund manager and Harvard MBA, created the Khan Academy five years ago when he was tutoring his cousins long distance. Khan posted the tutorials on YouTube, which later exploded in popularity. Today more than a million people avail the roughly 2,200 free tutorials that are parked on the nonprofit site. Most of the videos are no more than 10 minutes long and capture Khan himself writing on his digital sketchpad software.

If reports of  the Chronicle of Higher Education––the major news service in the United States academic world––have to be believed, Kahn’s videos are more popular than free online lectures posted by professors at some of the leading US universities.

The Khan Academy’s library of videos covers the entire gamut of math concepts––from the most basic subjects to the highly complex ones. From material for the kindergartner, a 1 + 1 = 2 lesson, to difficult college-level subjects such as linear algebra and differential equations, the library has it all. The library also includes tutorials on such subjects as chemistry, economics, biology, physics, finance, astronomy, and even the French Revolution.

College grads grappling with linear algebra will greatly benefit from the nearly 150 tutorials listed on this topic in Khan’s library of videos. There is help for nearly all such difficult concepts. These videos simplify daunting topics such as Singular Matrices and Rotation in R3 around the X-axis under linear algebra.

Khan’s simple tutorials fascinated Bill Gates, who is now financially supporting the Khan Academy, which aims to also make an impact in brick and mortar classrooms. The Khan Academy aspires to be a virtual stand-alone school where anyone in the world can learn anything.