EDX ? Analyzing and Visualizing Data with Power BI (Audit Free)
University of Illinois & Microsoft course teaching Power BI for analytics and reporting, free in audit mode.
Ready4GRE Vocabulary App
Free app with flashcards, quizzes, and personalized study plans for GRE vocabulary practice.
HackerRank SQL Domain
SQL challenges of varying difficulty levels with instant online feedback, great for structured practice.
SQL Shack ? Power BI
Collection of practical Power BI tutorials and tips, especially useful for SQL Server professionals integrating BI dashboards.
GregMat (YouTube)
Popular YouTube channel with hundreds of free GRE quant and verbal walkthroughs, strategies, and practice problem explanations.
King?s Wargaming Network
Academic network advancing theory and application of wargaming for research and teaching within Security Studies.
RAND ? Wargaming
Overview of RAND?s analytic wargaming practice, including tabletop, seminar, and computer-supported games used for research and decision support.
Mode SQL Tutorial
Practical SQL lessons taught in-browser, with real-world datasets and instant feedback for analysts.
Kaggle Learn - Data Analysis
Hands-on mini-courses for Python, R, SQL, and visualization with Jupyter notebooks that run directly in the browser.
StatQuest with Josh Starmer (YouTube)
Clear and approachable explanations of statistics and data analysis, breaking down complex concepts into simple steps.
Stack Overflow - R Tag
A huge developer community answering detailed questions about R, packages, and applied statistics.
Microsoft Learn ? Power BI
Official Microsoft Learn platform with guided, hands-on modules for Power BI, covering everything from basics to advanced analytics.
MySQL Tutorial
Extensive resource for learning MySQL with examples, from installation and schema design to joins and triggers.
DataCamp Free Courses
Free beginner-friendly courses in data analysis with Python, R, and SQL; includes guided projects.
Dataquest Free Data Analysis Courses
Browser-based lessons in Python, SQL, and data visualization; first modules free.
CRAN R Project Documentation
Official manuals, FAQs, and reference documentation for the R language from the Comprehensive R Archive Network.
W3Schools Python
Step-by-step interactive lessons for Python basics, data structures, and functions, with hands-on coding snippets.
Kaplan GRE Free Resources
Free practice tests, sample questions, and study materials from Kaplan.
Tableau Public Resources
Free resources and tutorials for using Tableau to create interactive visualizations and dashboards.