Exercises Websites
Khan Academy
With a library of over 3,000 videos covering everything from arithmetic to physics, finance, and history and hundreds of skills to practice, we're on a mission to help you learn what you want, when you want, at your own pace.
2,574,899 
$ 240.00
W3Schools Online Web Tutorials
Well organized and easy to understand Web building tutorials with lots of examples of how to use HTML, CSS, JavaScript, SQL, Python, PHP, Bootstrap, Java, XML and more.
138 $ 64,007,280.00
Advanced English lessons
Englishpage.com offers free English lessons with English grammar and vocabulary exercises online. Hundreds of English lessons to help you learn English today!
25,359 $ 327,600.00
The Tongue Untied Introduction to Grammar
The Tongue Untied; A Guide to Grammar, Punctuations and Style ÃÂâââÂÂìââÂ¬à  Includes detailed terms, interactive exercises and quizzes.
447,072 $ 5,400.00
ExRx (Exercise Prescription) on the Internet
ExRx.net is a exercise resource of over 2000 pages for the exercise professional, coach, or fitness enthusiast. ExRx.net features a comprehensive exercise instruction and kinesiology reference for exercise prescription with over 1400 animated exercises demonstrated, described, and analyzed.
32,858 $ 252,720.00
World English : test, learn and study the English language online
English on the internet. The best online resource for English as a second or foreign language (ESL / EFL), English exercises and activities, online English lessons with native speakers of English.
53,895 $ 154,080.00
Cool Math - free online cool math lessons, cool math games & apps, fun math activities, pre-algebra, algebra, precalculus
Cool Math has free online cool math lessons, cool math games and fun math activities. Really clear math lessons (pre-algebra, algebra, precalculus), cool math games, online graphing calculators, geometry art, fractals, polyhedra, parents and teachers areas too.
18,958 $ 438,480.00
Language Learning | Goethe Verlag | Learn English and other languages online for free!
Learn languages! Arabic Chinese Croatian Czech Danish Dutch English French German Greek Hindi Italian Korean Polish Portuguese Russian Spanish Thai Turkish
109,369 $ 62,400.00
EnglishGrammar.org – Exercise, test, and check your grammar online
Free English grammar exercises, lessons, and PDF downloads. Grammar check your texts online or read our comprehensive grammar rules review.
319,089 $ 16,200.00