Kaplan GRE Free Resources

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

Springboard Data Analytics Curriculum (Free Prep)

Introductory lessons and exercises to build foundation skills in Excel, SQL, and data storytelling.

Guy in a Cube (YouTube)

Popular YouTube channel run by Microsoft employees, offering weekly tutorials, best practices, and troubleshooting tips for Power BI.

CS50?s Introduction to Python

Harvard?s free course introducing programming using Python, with video lectures, notes, and problem sets.

Math StackExchange

A global community where advanced math students and professionals ask and answer detailed mathematics questions, from abstract algebra to applied math.

Power BI Guided Learning (Microsoft)

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

DataCamp Free Courses

Free beginner-friendly courses in data analysis with Python, R, and SQL; includes guided projects.

FreeCodeCamp - Data Analysis with Python

Full curriculum teaching Python for data analysis, including Pandas, NumPy, data cleaning, and visualization, with projects.

Dataquest Free Data Analysis Courses

Browser-based lessons in Python, SQL, and data visualization; first modules free.

Marine Corps Warfighting Lab ? Wargaming Division

USMC wargaming division supporting concept development and force design through iterative gaming and analysis.

LearnPython.org

Interactive, browser-based Python tutorials ranging from basic syntax to advanced modules.

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.

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.

R for Data Science (Hadley Wickham & Garrett Grolemund)

A free online book teaching R through the tidyverse approach, covering data wrangling, visualization, and modeling.

SQLBolt

Step-by-step interactive tutorials and exercises for learning SQL basics and querying relational databases.

Why Machines Learn

Anil Ananthaswamy

A deep dive into the elegant mathematical principles behind machine learning

SQLite Tutorial

Focused tutorials on SQLite, covering SQL basics, database management, and practical coding examples.

The AI-Driven Leader

Erik R. Peterson

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

The Carpentries - Data Carpentry

Community-driven lessons for researchers covering data organization, cleaning, visualization, and analysis in R, Python, and SQL.