Magoosh GRE Blog
Hundreds of free articles, study guides, vocabulary lists, and strategies for GRE verbal, quant, and writing.
Why Machines Learn
Anil Ananthaswamy
A deep dive into the elegant mathematical principles behind machine learning
King?s Wargaming Network
Academic network advancing theory and application of wargaming for research and teaching within Security Studies.
Khan Academy - Intro to SQL
Beginner-friendly course teaching SQL fundamentals with practice problems and video explanations.
Build a Large Language Model from Scratch
Charanpal Dhanjal
A hands-on guide to constructing your own LLM using modern machine learning techniques
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.
Coursera - Math for Machine Learning (Audit Free)
University of London courses on linear algebra, multivariate calculus, and statistics for machine learning, available free in audit mode.
Ready4GRE Vocabulary App
Free app with flashcards, quizzes, and personalized study plans for GRE vocabulary practice.
CS50?s Introduction to Python
Harvard?s free course introducing programming using Python, with video lectures, notes, and problem sets.
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.
Swirl: Learn R in R
An interactive R package that teaches R programming and data science concepts directly inside the R console.
Dataquest Free Data Analysis Courses
Browser-based lessons in Python, SQL, and data visualization; first modules free.
W3Schools Python
Step-by-step interactive lessons for Python basics, data structures, and functions, with hands-on coding snippets.
Programiz Python
Beginner-friendly tutorials covering Python basics, data structures, object-oriented programming, and standard libraries.
R-Bloggers
Aggregator of hundreds of blogs covering R tutorials, packages, and real-world data science applications.
Test Guide - GRE Practice
Large collection of free online GRE practice tests and section-specific drills.
Kaggle Learn Python
Hands-on mini-courses for Python and data science, with notebooks you can run in the browser for immediate practice.
Designing Machine Learning Systems
Chip Huyen
A practical blueprint for building production-ready ML systems with scalability and reliability
Stack Overflow - R Tag
A huge developer community answering detailed questions about R, packages, and applied statistics.