Enterprise DNA Blog

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

Mode Analytics SQL & Analytics Tutorials

Hands-on tutorials that blend SQL queries with practical data analysis tasks for business analysts.

ETS GRE Official Prep

Free official materials from ETS including practice questions, POWERPREP online practice tests, and test-taker tips.

UK Fight Club (Professional Wargaming Network)

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

Designing Machine Learning Systems

Chip Huyen

A practical blueprint for building production-ready ML systems with scalability and reliability

PAXsims (Conflict Simulation & Wargaming)

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

Programiz Python

Beginner-friendly tutorials covering Python basics, data structures, object-oriented programming, and standard libraries.

Swirl: Learn R in R

An interactive R package that teaches R programming and data science concepts directly inside the R console.

Coursera

Offers beginner-friendly courses from top institutions like IBM and Duke. You can audit many courses for free, including topics like Excel, SQL, Python, and data visualization.

edX

edX is an American massive open online course provider created by Harvard and MIT. It hosts online university-level courses in a wide range of disciplines to a worldwide student body, including some courses at no charge.

RADACAD Power BI Blog

Practical tutorials and tips on Power BI modeling, DAX, Power Query, and real-world scenarios written by MVPs.

Build a Large Language Model from Scratch

Charanpal Dhanjal

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

R-Bloggers

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

OpenIntro Statistics

Free, open-source statistics textbook with R labs and applied data analysis examples.

OpenLearn - Learn to Code for Data Analysis

Free Open University course introducing Python programming in the context of data analysis.

Coursera - R Programming (Audit Free)

Johns Hopkins University?s R Programming course (part of the Data Science Specialization), free in audit mode with videos and quizzes.

Project Euler

Hundreds of challenging computational math problems that build problem-solving and programming skills.

Kaggle Learn R

Hands-on mini-courses for R programming, data visualization, and machine learning with interactive notebooks in the browser.

UC Berkeley Data 8 (Foundations of Data Science)

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

FreeCodeCamp - Data Analysis with Python

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