PyBites Platform (Free Exercises)
Short, practical coding exercises (some free) focused on solving real-world problems in Python.
MOOC.fi - Introduction to Data Analysis with Python
Free course from University of Helsinki teaching data analysis workflows with Python and Pandas.
The AI-Driven Leader
Erik R. Peterson
A guide to leveraging AI for smarter decision-making and leadership strategies
Guy in a Cube (YouTube)
Popular YouTube channel run by Microsoft employees, offering weekly tutorials, best practices, and troubleshooting tips for Power BI.
LearnPython.org
Interactive, browser-based Python tutorials ranging from basic syntax to advanced modules.
Marine Corps University Press ? Wargaming Topic
Curated publications on wargaming theory and practice relevant to military education and planning.
UK Fight Club (Professional Wargaming Network)
Community that promotes professional military wargaming and simulation activities across UK defense.
ModernDive: Statistical Inference via Data Science
Free online textbook teaching statistical inference and regression using R and tidyverse methods.
HackerRank SQL Domain
SQL challenges of varying difficulty levels with instant online feedback, great for structured practice.
DataCamp (Free R Tutorials)
While DataCamp is subscription-based, it offers free introductory R courses covering basics, data manipulation, and visualization.
Harvard Business School Online - Data Science Ready (Free Modules)
Intro modules teaching how analytics applies to business decisions, tailored for managers and analysts.
Enterprise DNA Blog
Tutorials and case studies focused on practical Power BI usage, advanced DAX, and visualization techniques.
Magoosh GRE Blog
Hundreds of free articles, study guides, vocabulary lists, and strategies for GRE verbal, quant, and writing.
3Blue1Brown (YouTube)
Visual, intuitive explanations of advanced concepts like linear algebra, calculus, Fourier transforms, and neural networks using stunning animations.
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.
Why Machines Learn
Anil Ananthaswamy
A deep dive into the elegant mathematical principles behind machine learning
R-Bloggers
Aggregator of hundreds of blogs covering R tutorials, packages, and real-world data science applications.
W3Schools SQL
Beginner-friendly SQL tutorials with examples of queries, joins, constraints, and subqueries, plus an interactive editor.
Build a Large Language Model from Scratch
Charanpal Dhanjal
A hands-on guide to constructing your own LLM using modern machine learning techniques