PAXsims (Conflict Simulation & Wargaming)
Long-running blog on serious games and wargaming for policy, education, and analysis with news, methods, and reviews.
Power BI Guided Learning (Microsoft)
Step-by-step tutorials directly from Microsoft, teaching data connection, modeling, visualization, and publishing dashboards.
Automate the Boring Stuff with Python
A free online book teaching Python through practical examples like automating tasks, web scraping, and file management.
Manhattan Prep GRE Resources
Free GRE study materials, strategy guides, and practice question sets.
Google Data Analytics Certificate (Audit Free)
Comprehensive beginner-to-intermediate program covering spreadsheets, SQL, R, visualization, and analytics workflows; free in audit mode.
R-Bloggers
Aggregator of hundreds of blogs covering R tutorials, packages, and real-world data science applications.
Harvard Business School Online - Data Science Ready (Free Modules)
Intro modules teaching how analytics applies to business decisions, tailored for managers and analysts.
DataCamp Free Courses
Free beginner-friendly courses in data analysis with Python, R, and SQL; includes guided projects.
ETS GRE Official Prep
Free official materials from ETS including practice questions, POWERPREP online practice tests, and test-taker tips.
King?s Wargaming Network
Academic network advancing theory and application of wargaming for research and teaching within Security Studies.
MiT Open CourseWare
MIT OpenCourseWare offers free access to thousands of MIT course materials?lectures, assignments, and exams?covering subjects from engineering and computer science to economics and the humanities. It's open learning at its best, with no registration required.
DataCamp (Free R Tutorials)
While DataCamp is subscription-based, it offers free introductory R courses covering basics, data manipulation, and visualization.
Springboard Data Analytics Curriculum (Free Prep)
Introductory lessons and exercises to build foundation skills in Excel, SQL, and data storytelling.
GregMat (YouTube)
Popular YouTube channel with hundreds of free GRE quant and verbal walkthroughs, strategies, and practice problem explanations.
Mode SQL Tutorial
Practical SQL lessons taught in-browser, with real-world datasets and instant feedback for analysts.
Analytics Vidhya
Wide range of free tutorials, guides, and case studies on data analytics, machine learning, and business intelligence.
RAND ? Wargaming
Overview of RAND?s analytic wargaming practice, including tabletop, seminar, and computer-supported games used for research and decision support.
Mode Analytics SQL & Analytics Tutorials
Hands-on tutorials that blend SQL queries with practical data analysis tasks for business analysts.
OpenStax Mathematics
Peer-reviewed, openly licensed textbooks covering college algebra, calculus, and statistics; downloadable for free in PDF or web format.
Naval War College ? Wargaming Department
Department page describing applied gaming, methods, and how wargaming supports leadership education and analysis.