Khan Academy
Calculus 1
Interactive first course in calculus with videos and mastery practice on limits, derivatives and integrals.
Keith Devlin's Stanford course on how mathematicians think: logic, quantifiers and proofs.
Taught byCourseraOffered by Stanford Online on Coursera, this course helps learners move from school-style calculation to the reasoning used in university mathematics. It covers the language of logic, quantifiers and proof, then applies them to number theory and real analysis.
Best for: Students preparing for proof-based university maths.
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Before you start: High school mathematics
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