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Learning links
10 September 2025
Python
PyBites Platform (Free Exercises)

Short, practical coding exercises (some free) focused on solving real-world problems in Python.

Data Analytics
MOOC.fi - Introduction to Data Analysis with Python

Free course from University of Helsinki teaching data analysis workflows with Python and Pandas.

Books
The AI-Driven Leader

Erik R. Peterson

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

PowerBI
Guy in a Cube (YouTube)

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

Python
LearnPython.org

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

Wargaming
Marine Corps University Press ? Wargaming Topic

Curated publications on wargaming theory and practice relevant to military education and planning.

Wargaming
UK Fight Club (Professional Wargaming Network)

Community that promotes professional military wargaming and simulation activities across UK defense.

R
ModernDive: Statistical Inference via Data Science

Free online textbook teaching statistical inference and regression using R and tidyverse methods.

Databases & SQL
HackerRank SQL Domain

SQL challenges of varying difficulty levels with instant online feedback, great for structured practice.

R
DataCamp (Free R Tutorials)

While DataCamp is subscription-based, it offers free introductory R courses covering basics, data manipulation, and visualization.

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

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

PowerBI
Enterprise DNA Blog

Tutorials and case studies focused on practical Power BI usage, advanced DAX, and visualization techniques.

Math
Alison

Free online courses from the world?s leading experts. Join 20 million learners today.

GRE Prep
Magoosh GRE Blog

Hundreds of free articles, study guides, vocabulary lists, and strategies for GRE verbal, quant, and writing.

Math
3Blue1Brown (YouTube)

Visual, intuitive explanations of advanced concepts like linear algebra, calculus, Fourier transforms, and neural networks using stunning animations.

Data Analytics
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.

Books
Why Machines Learn

Anil Ananthaswamy

A deep dive into the elegant mathematical principles behind machine learning

R
R-Bloggers

Aggregator of hundreds of blogs covering R tutorials, packages, and real-world data science applications.

Databases & SQL
W3Schools SQL

Beginner-friendly SQL tutorials with examples of queries, joins, constraints, and subqueries, plus an interactive editor.

Books
Build a Large Language Model from Scratch

Charanpal Dhanjal

A hands-on guide to constructing your own LLM using modern machine learning techniques