By Quick answer: What are the best online courses for students in summer 2027?
- Best overall — Harvard CS50 (free).
- AI — CS50 AI, OpenAI Academy, Elements of AI.
- Data — Kaggle Learn.
- Projects — freeCodeCamp.
Key takeaways
- Students can earn real certificates free over one summer.
- Finish one big course rather than starting five.
- Add a project to GitHub to show what you learnt.
Summer is the best time for students to add skills that classes don't cover. The good news: the best courses are free. These seven suit students in any major, from computer science to business and the arts.
Seven summer courses at a glance
Ranked for this reader. Costs and formats come from each issuer's own page, checked on 3 November 2026; prices change, so confirm before you book.
| # | Certification | Cost | Time | Prove it free |
|---|---|---|---|---|
| 1 | CS50: Introduction to Computer ScienceHarvard University | Free1 | Self-paced | Free test |
| 2 | CS50's Introduction to AI with PythonHarvard University | Free2 | Self-paced | Free test |
| 3 | Kaggle Learn Micro-Courses (ML, Python, SQL)Kaggle (Google) | Free3 | Short micro-courses, a few hours each | Free test |
| 4 | freeCodeCamp CertificationsfreeCodeCamp | Free4 | Self-paced | Free test |
| 5 | PCEP – Certified Entry-Level Python ProgrammerPython Institute | Check the official page5 | 30-question style entry exam (see official page) | Free test |
| 6 | OpenAI AcademyOpenAI | Free6 | Self-paced | Free test |
| 7 | Elements of AIUniversity of Helsinki & MinnaLearn | Free7 | Self-paced | Free test |
Prove it free before you pay for an exam
Take the free test first. Pay for an exam only when you pass.
Every pick above has a matching free practice test on Science of Apps, one of the world's largest libraries of free certification tests (1,200+). Check your level before you pay for an exam, or add a verifiable credential to LinkedIn while you study. (Disclosure: we publish these tests; the certifications above earn us nothing.)
- Computer Science Fundamentals TestPractise for CS50: Introduction to Computer Science before you pay.Start free test →
- Machine Learning Fundamentals CertificationPractise for CS50's Introduction to AI with Python before you pay.Start free test →
- Front-End Development CertificationPractise for freeCodeCamp Certifications before you pay.Start free test →
- PCEP Practice Test (Python Institute)Practise for PCEP – Certified Entry-Level Python Programmer before you pay.Start free test →
Each course, and the student it suits
- Harvard UniversityCS50: Introduction to Computer ScienceComputer science foundationsFree
- Harvard UniversityCS50's Introduction to AI with PythonAI with PythonFree
- KaggleKaggle Learn Micro-Courses (ML, Python, SQL)Data and ML, quickFree
CS50: Introduction to Computer Science
- Cost
- Free1
Harvard's famous introduction to computer science, free with a free certificate. Harvard's free introduction to computer science teaches C, Python, SQL and web development through demanding problem sets, with a free certificate. An optional paid verified certificate is available through edX.
Best forcomputer science foundations
CS50's Introduction to AI with Python
- Cost
- Free2
Harvard's free AI course in Python, for students who know some programming. Harvard's free course teaches AI with Python through projects: search, optimisation, machine learning, neural networks and language. It assumes some Python and offers an optional paid verified certificate through edX.
Best forAI with Python
Kaggle Learn Micro-Courses (ML, Python, SQL)
- Cost
- Free3
- Time
- Short micro-courses, a few hours each
Short, free courses in Python, SQL and ML, a few hours each, with certificates. Kaggle's free micro-courses cover Python, pandas, SQL, data visualisation and machine learning, each in a few hours with hands-on notebooks and a free certificate. They're ideal practice alongside a structured course.
Best fordata and ML, quick
freeCodeCamp Certifications
- Cost
- Free4
Free coding certifications earned by building projects. freeCodeCamp's free certifications in web design, JavaScript, Python, data analysis and more are earned by building projects that must pass automated tests. The projects make useful portfolio pieces.
Best forcoding projects
PCEP – Certified Entry-Level Python Programmer
- Cost
- Check the official page5
- Format
- 30-question style entry exam (see official page)
The Python Institute's entry exam, a vendor-neutral credential for students. The Python Institute's entry exam proves core Python: data types, control flow, functions and basic data structures. It's vendor-neutral and a good first exam-based credential before PCAP; check the official page for the fee.
Best foran exam-based Python credential
OpenAI Academy
- Cost
- Free6
Free learning on using AI tools well, for students in any major. OpenAI Academy's free learning covers using ChatGPT and OpenAI's tools effectively at work and in education. It's practical and tool-specific, so pair it with a tool-neutral course if you use several assistants.
Best forusing AI tools
Elements of AI
- Cost
- Free7
- Time
- Self-paced
A free, non-technical introduction to AI from the University of Helsinki. The University of Helsinki and MinnaLearn's free, self-paced course explains AI concepts without code, from machine learning basics to societal impact. It's one of the most accessible introductions to AI for anyone.
Best forAI basics for any major
A 10-week summer plan
- Weeks 1–6 — CS50 (or Elements of AI if you're not in a technical major).
- Weeks 7–8 — Kaggle Python and SQL.
- Weeks 9–10 — one project; take a free Science of Apps test to finish the summer.
How we ranked these picks
We chose courses that are free or low-cost, suit students and give certificates. Fees come from official pages, checked 3 November 2026.
Frequently asked questions
What are the best free summer courses for students?
Harvard CS50, Kaggle Learn, freeCodeCamp, OpenAI Academy and Elements of AI are all free.
Do summer course certificates help college applications?
They can show initiative, especially with a project. Check each programme's expectations.
Which summer course is best for non-tech students?
Elements of AI and OpenAI Academy need no programming.
Can high school students take these courses?
Yes. CS50, Kaggle and Elements of AI are open to anyone.
Is there a free test students can take?
Yes. Science of Apps offers 1,200+ free certification tests with instant results.
Sources
- Harvard University — CS50: Introduction to Computer Science, official page (checked 3 Nov 2026)
- Harvard University — CS50's Introduction to AI with Python, official page (checked 3 Nov 2026)
- Kaggle (Google) — Kaggle Learn Micro-Courses (ML, Python, SQL), official page (checked 3 Nov 2026)
- freeCodeCamp — freeCodeCamp Certifications, official page (checked 3 Nov 2026)
- Python Institute — PCEP – Certified Entry-Level Python Programmer, official page (checked 3 Nov 2026)
- OpenAI — OpenAI Academy, official page (checked 3 Nov 2026)
- University of Helsinki & MinnaLearn — Elements of AI, official page (checked 3 Nov 2026)
- Checked November 4, 2026. Figures that change — fees, salaries, prices — are reviewed every six months; if something is out of date, tell us.
Where to go from here
- The best online certifications of 2027 — the full top 10 across every field
- Best AI Certifications of 2027: 10 Ranked by Career Impact — related guide
- Science of Apps free certification catalogue — 1,200+ free tests
- Career guides by Science of Apps for 2027The top online certifications for high school students in 2027: eight free or low-cost picksThe 8 best online certifications for high school students in 2027: CS50, Elements of AI, Kaggle, freeCodeCamp, PCEP, Canva, Red Cross CPR and AI Essentials.
- Career guides by Science of Apps for 2027Free AI certifications in 2027: seven that cost nothing and still teach you something real7 free AI certifications for 2027: Elements of AI, Harvard CS50 AI, Kaggle, Anthropic, OpenAI Academy, Microsoft Learn and AI For Everyone, with what's free.
- Career guides by Science of Apps for 2027The top certifications for researchers and scientists in 2027: seven for data, code and MLThe 7 best certifications for researchers and scientists in 2027: Harvard CS50, PCEP, Kaggle, freeCodeCamp, IBM Data Science, ML and Deep Learning.
- Career guides by Science of Apps for 2027The best Python certifications of 2027: eight for beginners, data people and developersThe 8 best Python certifications of 2027: PCEP, Harvard CS50 and CS50 AI, freeCodeCamp, Kaggle, IBM Data Science, Meta Back-End and the ML Specialization.
- Career guides by Science of Apps for 2027Python certifications for beginners: six best for 2027, from first line of code to first projectThe 6 best Python certifications for beginners in 2027: Kaggle Python, Harvard CS50, freeCodeCamp, PCEP, IBM Data Science and Google Advanced Data Analytics.
- Career guides by Science of Apps for 2027The best web development certifications of 2027: seven for front-end, back-end and full-stackThe 7 best web development certifications of 2027: Meta Front-End and Back-End, freeCodeCamp, Harvard CS50, AWS Cloud Practitioner, Google UX and PCEP.
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