Coursera
Writing in the Sciences
Kristin Sainani's Stanford course on clear, effective scientific and professional writing.
Paid certificateWriting & Humanities
23 hrsBeginner
173 free courses
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Coursera
Cryptography I
Stanford's well-known course on how cryptographic primitives work and how to use them correctly, taught by Dan Boneh.
Paid certificateCyber Security24 hrsIntermediateKeith Devlin's Stanford course on how mathematicians think: logic, quantifiers and proofs.
Paid certificateMathematics37 hrsIntermediate