The Carpentries - Data Carpentry
Community-driven lessons for researchers covering data organization, cleaning, visualization, and analysis in R, Python, and SQL.
edX - Data Analysis for Life Sciences
Harvard's free online courses teaching statistics, inference, modeling, and machine learning in the context of data science.
The AI-Driven Leader
Erik R. Peterson
A guide to leveraging AI for smarter decision-making and leadership strategies
Saylor Academy - Mathematics
Free, full-length math courses (Linear Algebra, Abstract Algebra, Real Analysis, etc.) with exams and certificates.
Princeton Review GRE Practice
Free practice test access, strategy sessions, and sample GRE questions.
SQLite Tutorial
Focused tutorials on SQLite, covering SQL basics, database management, and practical coding examples.
Manhattan Review Free GRE Resources
Free practice problems, diagnostic tests, and study tips from test prep experts.
CNA ? Gaming & Integration Program
Designs, facilitates, and analyzes sponsor-focused wargames for DoD and government decision-makers.
DataCamp (Free R Tutorials)
While DataCamp is subscription-based, it offers free introductory R courses covering basics, data manipulation, and visualization.
Coursera - Math for Machine Learning (Audit Free)
University of London courses on linear algebra, multivariate calculus, and statistics for machine learning, available free in audit mode.
UC Berkeley Data 8 (Foundations of Data Science)
Introductory data science/analytics course using Python; includes lectures, labs, and exercises for free online.
ETS GRE Official Prep
Free official materials from ETS including practice questions, POWERPREP online practice tests, and test-taker tips.
Math StackExchange
A global community where advanced math students and professionals ask and answer detailed mathematics questions, from abstract algebra to applied math.
PAXsims (Conflict Simulation & Wargaming)
Long-running blog on serious games and wargaming for policy, education, and analysis with news, methods, and reviews.
Swirl: Learn R in R
An interactive R package that teaches R programming and data science concepts directly inside the R console.
3Blue1Brown (YouTube)
Visual, intuitive explanations of advanced concepts like linear algebra, calculus, Fourier transforms, and neural networks using stunning animations.
Paul?s Online Math Notes
Comprehensive lecture notes, examples, and problem sets on calculus, differential equations, algebra, and more, written in an accessible format.
Power BI Guided Learning (Microsoft)
Step-by-step tutorials directly from Microsoft, teaching data connection, modeling, visualization, and publishing dashboards.