As of 2015, the Khan Academy website, KhanAcadamy.org, is a highly rated online learning website for children, according to Aleteia.org. Khan Academy is a not-for-profit organization. Its website helps school kids of all ages learn about a wide variety of subjects for free.
The Kahn Academy website is funded by many reputable organizations, including Google and the Bill and Melinda Gates Foundation. Kids must sign up to use the site. Once they do, they have to complete a tutorial and a preliminary test that establishes a customized learning plan for them. The website allows both parents and teachers to sign up and link their accounts to kids' accounts to monitor their progress.