Courses from 1000+ universities
AI got cheap enough that Duolingo’s most expensive plan may not survive it. I read the earnings call transcript and opened the app to see what is actually changing for learners.
600 Free Google Certifications
Artificial Intelligence
IT & Networking
Software Engineering
Supporting Victims of Domestic Violence
Know Thyself - The Value and Limits of Self-Knowledge: The Examined Life
Understanding Dementia
Organize and share your learning with Class Central Lists.
View our Lists Showcase
Learn Saving, earn certificates with free online courses from Harvard, Stanford, University of Pennsylvania, Johns Hopkins and other top universities around the world. Read reviews to decide if a class is right for you.
Speed up your sewing with 20+ efficient techniques for staystitching, seams, darts, facings, waistbands, zippers and more.
Learn how a ship's engine and deck departments cut fuel consumption: energy efficient machinery operation, ship handling measures, and onboard practices that reduce greenhouse gas emissions.
Take control of your money: build budgets, save for the future, manage debt, invest, and handle personal financial risk toward your goals.
Explores how integrated photonics can overcome energy and density limits in electrical interconnects, especially for communications within and between computing machines.
Master precision machining techniques to fabricate custom pins for heavy equipment, saving thousands compared to OEM parts through turning, welding, and milling processes.
Take control of your finances! Create an effective budget, pay off your debt, and start saving for the future.
How to secure your financial future the fun & easy way! Personal Finance: Financial Security Thinking & Principles
Compare money management options and liquid investment alternatives, then weigh credit card types, costs and benefits, and apply strategies for responsible borrowing.
Calculate your true take-home pay, sort expenses into priority tiers, build a balanced monthly budget, compare budgeting tools, and set up an emergency fund and first investments.
A plain-language personal finance guide that turns everyday money decisions into practical strategies for budgeting, debt, investing, insurance, and taxes.
Take charge of your financial future through actionable strategies to save, invest, and clear debt.
Learn to request permissions and save photos in external storage using Android’s scoped storage APIs on API 30 and later.
Learn how to keep Android UI state intact through configuration changes, activity recreation, and system-initiated process death.
Build a custom Unity tilemap level editor with editable tiles and file-based saving and loading.
Use an ESP32-CAM and MicroSD card to build simple, motion-sensitive, and time-lapse cameras that save images.
Get personalized course recommendations, track subjects and courses with reminders, and more.