OpenLearn - Learn to Code for Data Analysis
Free Open University course introducing Python programming in the context of data analysis.
Manhattan Prep GRE Resources
Free GRE study materials, strategy guides, and practice question sets.
PAXsims (Conflict Simulation & Wargaming)
Long-running blog on serious games and wargaming for policy, education, and analysis with news, methods, and reviews.
Coursera - R Programming (Audit Free)
Johns Hopkins University?s R Programming course (part of the Data Science Specialization), free in audit mode with videos and quizzes.
Nexus: A Brief History of Information Networks
Brian Christian
A sweeping narrative on the evolution and impact of global information networks
The Carpentries - Data Carpentry
Community-driven lessons for researchers covering data organization, cleaning, visualization, and analysis in R, Python, and SQL.
Power BI Guided Learning (Microsoft)
Step-by-step tutorials directly from Microsoft, teaching data connection, modeling, visualization, and publishing dashboards.
Khan Academy - Advanced Math
Free structured lessons with videos and practice exercises covering algebra, calculus, statistics, linear algebra, and differential equations.
Real Python (Free Articles)
In-depth tutorials, explanations, and code examples for beginners to advanced Python developers, with a mix of free and premium content.
RADACAD Power BI Blog
Practical tutorials and tips on Power BI modeling, DAX, Power Query, and real-world scenarios written by MVPs.
MySQL Tutorial
Extensive resource for learning MySQL with examples, from installation and schema design to joins and triggers.
Paul?s Online Math Notes
Comprehensive lecture notes, examples, and problem sets on calculus, differential equations, algebra, and more, written in an accessible format.
Project Euler
Hundreds of challenging computational math problems that build problem-solving and programming skills.
Microsoft Learn ? Power BI
Official Microsoft Learn platform with guided, hands-on modules for Power BI, covering everything from basics to advanced analytics.
Quick-R (StatMethods)
Practical R tutorials focused on statistics, graphics, and data analysis, written in a straightforward, example-driven style.
RAND ? Wargaming
Overview of RAND?s analytic wargaming practice, including tabletop, seminar, and computer-supported games used for research and decision support.
Springboard Data Analytics Curriculum (Free Prep)
Introductory lessons and exercises to build foundation skills in Excel, SQL, and data storytelling.
Art of Problem Solving (AoPS) Online Resources
Challenging problems, explanations, and articles designed for advanced high school and college-level students interested in problem solving and Olympiad-style math.
Stack Overflow - R Tag
A huge developer community answering detailed questions about R, packages, and applied statistics.
Harvard Business School Online - Data Science Ready (Free Modules)
Intro modules teaching how analytics applies to business decisions, tailored for managers and analysts.