PAXsims (Conflict Simulation & Wargaming)

Long-running blog on serious games and wargaming for policy, education, and analysis with news, methods, and reviews.

Google Data Analytics Certificate (Audit Free)

Comprehensive beginner-to-intermediate program covering spreadsheets, SQL, R, visualization, and analytics workflows; free in audit mode.

Manhattan Prep GRE Resources

Free GRE study materials, strategy guides, and practice question sets.

Harvard Business School Online - Data Science Ready (Free Modules)

Intro modules teaching how analytics applies to business decisions, tailored for managers and analysts.

Kaplan GRE Free Resources

Free practice tests, sample questions, and study materials from Kaplan.

StatQuest with Josh Starmer (YouTube)

Clear and approachable explanations of statistics and data analysis, breaking down complex concepts into simple steps.

Test Guide - GRE Practice

Large collection of free online GRE practice tests and section-specific drills.

Microsoft Learn ? Power BI

Official Microsoft Learn platform with guided, hands-on modules for Power BI, covering everything from basics to advanced analytics.

Automate the Boring Stuff with Python

A free online book teaching Python through practical examples like automating tasks, web scraping, and file management.

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.

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.

RAND ? Wargaming

Overview of RAND?s analytic wargaming practice, including tabletop, seminar, and computer-supported games used for research and decision support.

Power BI Guided Learning (Microsoft)

Step-by-step tutorials directly from Microsoft, teaching data connection, modeling, visualization, and publishing dashboards.

Udemy

Udemy is a global learning platform offering self-paced courses in analytics, statistics, and decision modeling?ideal for those pursuing or preparing for a U.S. Army ORSA role.

IBM Data Analyst Professional Certificate (Audit Free)

Covers data analysis with Excel, SQL, Python, and data visualization tools, including projects and case studies; free in audit mode.

The AI-Driven Leader

Erik R. Peterson

A guide to leveraging AI for smarter decision-making and leadership strategies

UC Berkeley Data 8 (Foundations of Data Science)

Introductory data science/analytics course using Python; includes lectures, labs, and exercises for free online.

Khan Academy - Intro to SQL

Beginner-friendly course teaching SQL fundamentals with practice problems and video explanations.

Quick-R (StatMethods)

Practical R tutorials focused on statistics, graphics, and data analysis, written in a straightforward, example-driven style.