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khanacademy.org

Learn for free about math, art, computer programming, economics, physics, chemistry, biology, medicine, finance, history, and more. Khan Academy is a nonprofit with the mission of providing a free, world-class education for anyone, anywhere.

physicsclassroom.com

The Physics Classroom serves students, teachers and classrooms by providing classroom-ready resources that utilize an easy-to-understand language that makes learning interactive and multi-dimensional. Written by teachers for teachers and students, The Physics Classroom provides a wealth of resources that meets the varied needs of both students and teachers.

chegg.com

Innovative learning tools. 24/7 support. All in one place. Homework help for relevant study solutions, step-by-step support, and real experts.

quizlet.com

quizlet makes simple learning tools that let you study anything. start learning today with flashcards, games and learning tools — all for free.

coursera.org

Coursera has a deep commitment to making a positive impact on society. Learn more about how our social impact program provides access to high-quality education for communities in need.

edx.org

Find the online learning path for you, delivered by world-class institutions like Harvard, Google, Amazon, and more.

wolframalpha.com

Step-by-step solutions, homework help, practice problems, web apps. For math, physics, chemistry, biology, engineering, economics, astronomy, statistics.

mathway.com

free math problem solver answers your algebra homework questions with step-by-step explanations.

symbolab.com

Symbolab: equation search and math solver - solves algebra, trigonometry and calculus problems step by step

studocu.com

studocu provides access to millions of study materials shared by university and high school students from over 60 countries. join the community today!