Trustworthy Online Controlled Experiments (opens provider site in a new tab)
The A/B testing reference from Microsoft, Google, and LinkedIn veterans. Essential for product analysts.
Data Science
Cleaning, analyzing, and communicating data with Python or R.
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16 picks · 10 free · 13 providers · curated by Rowland Kuru
Editor's intro
Editor's intro
Data science is less about fancy models than most course marketing suggests. Day to day, it's getting messy data into shape, asking a sharp question, answering it honestly, and explaining the answer to people who don't read code. This feed weights its picks accordingly: data wrangling and communication get as much space as machine learning.
Pick a language first — Python if you also want to build software or do machine learning, R if you're headed toward research or statistics-heavy work. Learn one data library deeply, then practise on real datasets every week. The certificates here are useful for career changers; the free books are what working data scientists actually reread.
Start here
Python for Data Analysis, 3rd Edition
Python for Data Analysis is written by Wes McKinney, the creator of pandas, and it's free to read online in its third edition. It teaches the tools you'll use every single day — NumPy arrays, pandas DataFrames, grouping, reshaping, time series, and basic plotting — with realistic examples rather than toy ones. Read it alongside a Jupyter notebook and retype the examples on a dataset you care about. It's not a statistics book, so pair it with the Statistics feed once you're comfortable.
This week added
All picks
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Beginner · 7
Loading, cleaning, summarizing, and charting data. Choose Python or R and stick with it for now.
Data Analysis with Python (opens provider site in a new tab)
NumPy, pandas, and visualization projects checked by automated tests. Free certification included.
Free
Data Visualization (opens provider site in a new tab)
Short seaborn exercises that get you making sensible charts quickly.
Free
Pandas (opens provider site in a new tab)
A few hours of hands-on exercises. The quickest way to get comfortable with DataFrames.
Free
R for Data Science (2e) (opens provider site in a new tab)
Hadley Wickham's tidyverse book. If you choose R, this is where to begin.
Free Free to read online
Google Data Analytics Professional Certificate (opens partner site in a new tab)
Spreadsheets, SQL, Tableau, and R with a career focus. Recognized by many entry-level employers.
Paid Financial aid available Partner
IBM Data Science Professional Certificate (opens partner site in a new tab)
A Python-first alternative to Google's certificate, with more machine learning toward the end.
Paid Financial aid available Partner
The Data Science Course: Complete Data Science Bootcamp (opens partner site in a new tab)
Math, statistics, Python, and ML in one package. Breadth over depth, at a modest price.
Paid 30-day refund Partner
Intermediate · 5
Full analysis projects, communicating results, and the statistics that keep conclusions honest.
Python Data Science Handbook (opens provider site in a new tab)
NumPy, pandas, Matplotlib, and scikit-learn in one free, clear, and complete book.
Free Free to read online
Storytelling with Data (opens provider site in a new tab)
Cole Nussbaumer Knaflic on charts that persuade. The blog and practice exercises are free.
Free Books sold separately
TidyTuesday (opens provider site in a new tab)
A new real dataset every week. Practise analysis and share results with a friendly community.
Free
Data Science Specialization (Johns Hopkins) (opens partner site in a new tab)
Ten R-based courses ending in a capstone. Old-school, rigorous, and still respected.
Paid Financial aid available Partner
HarvardX Data Science Professional Certificate (opens partner site in a new tab)
Rafael Irizarry's R-based program. Strong on inference, modeling, and reproducible analysis.
Paid Free audit track Partner
Advanced · 3
Causal inference, experimentation, and the data engineering that feeds everything else.
Causal Inference: The Mixtape (opens provider site in a new tab)
Causal inference for people who need answers, not correlations. Free online and very readable.
Free Free to read online
Data Engineering Zoomcamp (opens provider site in a new tab)
A free cohort course on pipelines, warehouses, and orchestration. Where analysis meets infrastructure.
Free
Trustworthy Online Controlled Experiments (opens provider site in a new tab)
The A/B testing reference from Microsoft, Google, and LinkedIn veterans. Essential for product analysts.
Paid New