Harvard's free-course catalog

The free slice of Harvard's Professional and Lifelong Learning catalogue, read 2026-09-09: 129 results, 128 distinct courses, every one of them online. It is the spoke's first source that is neither a curriculum nor a study of one, but an institution's current offer, and it happens to be the same offer mooc-pivot measured the outcomes of.

What is in it

Counted from the 128 course cards, by the catalogue's own subject label:

The computing block (Computer Science, Data Science, Programming) is 34 of 128, 37 with Mathematics: the largest bloc after Humanities. 97 of the 128 state a length, from 1 to 16 weeks with a median of 8. The filter facets offer twelve subject areas, twelve Harvard schools, three difficulty levels and four modalities, but every free course on offer is Online.

Two structures worth naming

CS50 is a franchise, not a course. Ten of the free listings carry the CS50 brand: the original Introduction to Computer Science, then Python, Web Programming, Databases with SQL, Artificial Intelligence with Python, Cybersecurity, Scratch, 2D Game Development, Computer Science for Business and CS50 for Lawyers. The intro course has been forked by audience and by topic, not by level. Nothing in this spoke's repositories does that, because a repository has one author and no brand to extend; this is what a curriculum looks like when an institution can staff it.

A paid certificate programme, served free in pieces. Eight courses are titled Data Science: X — R Basics, Probability, Inference and Modeling, Linear Regression, Wrangling, Productivity Tools, Building Machine Learning Models, Capstone — which is HarvardX's Data Science professional certificate decomposed into individually auditable parts. The sequence is real and the credential is the thing being sold.

"Free," with an asterisk the catalogue does not expand

Every price on the listing page reads Free * and the footnote is not in the page. Four course pages were opened to find out what it means, and they agree: "Audit for Free — Add a Verified Certificate for $219" (CS50, Data Science: R Basics, and the Pyramids of Giza archaeology course), $299 for Introduction to Data Science with Python. So the material is free and the evidence you did it is not, at roughly the price of a textbook. That is not a catch; it is the MOOC business model stated plainly. But this wiki should record that "129 free Harvard courses" means 129 free audits.

What it says about this spoke's arguments

The exam is not what shapes it, and neither is a job title. synthesis's founding claim is that these curricula are shaped by the assessment behind them; developer-roadmap broke that by being shaped by a job title instead. Harvard's catalogue is shaped by neither. Its subject mix is the shape of a university's faculties. Humanities is the largest single block and Mathematics has three courses, which no learner demand and no hiring process would produce. A fourth shaping force, and the only one here that predates the internet.

And it publishes no outcomes whatsoever. Durations, difficulty levels, subjects and schools, on 129 courses, with no enrolment figure, no completion rate and no learner count anywhere in the catalogue. The institution that co-published the dataset behind mooc-pivot (every HarvardX and MITx course to May 2018, 12.67M registrations, second-year retention falling 38% to 7%) shows a prospective student none of it. The corpus's standing caveat has been that a star count measures intent rather than learning; here there is not even a star count.

Tier and caveats

T1 as a first-party institutional catalogue: Harvard listing Harvard's own courses is the best possible evidence of what Harvard offers. It is no evidence at all about teaching quality, completion or what a learner gets out of any of it.

The listing is live and will drift: course instances expire, prices change, the count moves. Every number here is a 2026-09-09 reading, taken by walking the paginated result set and counting the cards. Certificate prices were checked on four courses out of 128, so treat $219 as the common case rather than the rule.

Related

mooc · mooc-pivot · harvard-university · meta-curriculum · interview-preparation · cs2023 · developer-roadmap · coding-interview-university · synthesis