Study Notes is an online learning tool created by high school junior Feross Aboukhadijeh in El Dorado Hills, California.

By September 2011, Study Notes was receiving 10,000 page views per day.

[2] As of September 2015, Study Notes has served over 43 million users.

[3] But it grew to include the notes of his classmates as well, covering three courses: AP English, U.S. History, and U.S.

Study Notes releases the custom software which powers the site on GitHub under the GNU General Public License version 3, for anyone to learn from and contribute to.