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openstax.org

OpenStax offers free college textbooks for all types of students, making education accessible & affordable for everyone. Browse our list of available subjects!

lumenlearning.com

Lumen Learning provides professional development opportunities for educators, courses, and support to 500+ colleges, universities, consortia, & systems.

libretexts.org

libretexts is an ecosystem of connected tools that empower educators to create open educational resources at scale.

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.

sciencedirect.com

sciencedirect is the world's leading source for scientific, technical, and medical research. explore journals, books and articles.

quizlet.com

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

studystark.in

India's free study platform. Free video lectures, notes, PDFs for JEE, NEET, SSC and Board exams.

ed.ted.com

TED-Ed celebrates the ideas of teachers and students around the world. Discover hundreds of animated lessons, create customized lessons, and share your big ideas.

clrn.org

Easily convert centimeters to inches with our quick calculator and guide. Learn formulas, examples, and accurate results for everyday measurements