OpenLearn - Learn to Code for Data Analysis
Free Open University course introducing Python programming in the context of data analysis.
CrunchPrep GRE Blog
Guides and strategies for GRE preparation including word lists, essay templates, and quantitative shortcuts.
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
Mode SQL Tutorial
Practical SQL lessons taught in-browser, with real-world datasets and instant feedback for analysts.
MySQL Tutorial
Extensive resource for learning MySQL with examples, from installation and schema design to joins and triggers.
Khan Academy - Advanced Math
Free structured lessons with videos and practice exercises covering algebra, calculus, statistics, linear algebra, and differential equations.
Swirl: Learn R in R
An interactive R package that teaches R programming and data science concepts directly inside the R console.
LearnPython.org
Interactive, browser-based Python tutorials ranging from basic syntax to advanced modules.
UC Berkeley Data 8 (Foundations of Data Science)
Introductory data science/analytics course using Python; includes lectures, labs, and exercises for free online.
Real Python (Free Articles)
In-depth tutorials, explanations, and code examples for beginners to advanced Python developers, with a mix of free and premium content.
CNA ? Gaming & Integration Program
Designs, facilitates, and analyzes sponsor-focused wargames for DoD and government decision-makers.
3Blue1Brown (YouTube)
Visual, intuitive explanations of advanced concepts like linear algebra, calculus, Fourier transforms, and neural networks using stunning animations.
Nexus: A Brief History of Information Networks
Brian Christian
A sweeping narrative on the evolution and impact of global information networks
Manhattan Review Free GRE Resources
Free practice problems, diagnostic tests, and study tips from test prep experts.
Kaggle Learn - Data Analysis
Hands-on mini-courses for Python, R, SQL, and visualization with Jupyter notebooks that run directly in the browser.
Microsoft Learn - Data Analysis
Free learning paths covering data analysis basics and Power BI dashboards directly from Microsoft.
Paul?s Online Math Notes
Comprehensive lecture notes, examples, and problem sets on calculus, differential equations, algebra, and more, written in an accessible format.
Harvard Business School Online - Data Science Ready (Free Modules)
Intro modules teaching how analytics applies to business decisions, tailored for managers and analysts.