How Duolingo Plans to Reach 100M Users

Class Central

Rankings
Collections

Subjects

View all

Computer Science
Health & Medicine
Mathematics
Business
Humanities
Engineering
Science
Education & Teaching
Social Sciences
Art & Design
Artificial Intelligence
Data Science
Programming
Personal Development
Information Security (InfoSec)

View all Subjects

Universities
The Report

Courses from 1000+ universities

Rankings

Best Courses

Best of All Time
Best of the Year

Most Popular Courses

Most Popular of All Time
Most Popular of the Year

Collections

Computer Science

Algorithms and Data Structures
Internet of Things
Information Technology
Computer Networking
Machine Learning
DevOps
Deep Learning
Cryptography
Quantum Computing
Human-Computer Interaction (HCI)
Distributed Systems
Blockchain Development
Operating Systems
Computer Graphics
Automata Theory
Compilers
SCADA
Mainframe
Digital Image Processing
Computational Models
View all Computer Science

Health & Medicine

Nutrition & Wellness
Disease & Disorders
Public Health
Health Care
Nursing
Anatomy
Veterinary Science
Continuing Medical Education (CME)
Blood Pressure
Wellbeing
Women's Health
Dysphagia
Occupational Therapy
Hygiene
Healthcare Innovation
Music Therapy
Holistic Health
Ayurveda
Massage Therapy
Swallowing Disorders
View all Health & Medicine

Mathematics

Statistics & Probability
Foundations of Mathematics
Calculus
Discrete Mathematics
Trigonometry
Geometry
Algebra
Precalculus
Number Theory
Combinatorics
Mathematical logic
Linear Programming
Graph Theory
Set Theory
Group Theory
Differential Equations
Polynomials
Integration
Mathematical Analysis
Mathematical Thinking
View all Mathematics

Business

Management & Leadership
Finance
Entrepreneurship
Marketing
Strategic Management
Industry Specific
Business Intelligence
Accounting
Human Resources
Project Management
Sales
Design Thinking
Business Software
Customer Service
Nonprofit Management
Innovation
Operations Management
Corporate Governance
Business Plan
Business Proposal
View all Business

Humanities

History
Literature
Language Learning
Grammar & Writing
Philosophy
Religion
ESL
Culture
Sports
Journalism
Ethics
Linguistics
Food
Library Science
Reading
Crisis Management
Games
Emergency Management
Performing Arts
Religious Studies
View all Humanities

Engineering

Electrical Engineering
Mechanical Engineering
Civil Engineering
Robotics
Nanotechnology
GIS
Textiles
Manufacturing
BIM
CAD
Chemical Engineering
Energy Systems
Aerospace Engineering
Finite Element Analysis
GD&T (Geometric Dimensioning and Tolerancing)
Geotechnical Engineering
Reliability Engineering
Petroleum Engineering
Control Theory
Environmental Engineering
View all Engineering

Science

Chemistry
Physics
Environmental Science
Astronomy
Biology
Agriculture
Materials Science
Earth Science
Applied Science
Forensic Science
Meteorology
Horology
Paleontology
Fire Science
Sensory Science
Ergonomics
Physical Sciences
Complex Systems
Scientific Method
Medicine
View all Science

Education & Teaching

K12
Higher Education
STEM
Teacher Professional Development
Course Development
Online Education
Pedagogy
Social-emotional Learning (SEL)
Instructional Design
Homeschooling
Special Education
Adult Education
Course Design
Online Learning
Educational Technology
Curriculum Development
Next Generation Science Standards
Student-Centered Learning
Student Engagement
Classroom Management
View all Education & Teaching

Social Sciences

Sociology
Economics
Psychology
Anthropology
Political Science
Law
Urban Planning
Human Rights
Sustainability
Governance
Archaeology
Social Work
Early Childhood Development
Structural Equation Modeling
Cultural Studies
Community Engagement
Philanthropy
Behavioral Science
Media Studies
Global Development
View all Social Sciences

Art & Design

Music
Digital Media
Visual Arts
Design & Creativity
Photography
Art Therapy
Art Composition
Character Design
Fashion Design
Inspiration
Golden Ratio
Pattern Design
Geometric Patterns
Copic Markers
Jewelry Design
Animal Illustration
Anime Drawing
Street Art
Observational Drawing
Greeting Cards
View all Art & Design

Artificial Intelligence

Computer Vision
Natural Language Processing (NLP)
Neural Networks
Autonomous Vehicles
Chatbot
IBM Watson
Generative AI
Intelligent Systems
Genetic Algorithms
Intelligence
Heuristics
Ontology
Collective Intelligence
Autonomous Agents
Constraint Programming
AI Ethics
Semantics
Computational Linguistics
Computational Creativity
Evolutionary Algorithms
View all Artificial Intelligence

Data Science

Bioinformatics
Big Data
Data Mining
Data Analysis
Data Visualization
Jupyter Notebooks
Process Mining
Stata
Text Mining
Social Network Analysis
Computational Analysis
Data Collection
Information Retrieval
Data Processing
Data Wrangling
Data Extraction
Data Manipulation
Network Analysis
Data Preparation
Data Analytics
View all Data Science

Programming

Mobile Development
Web Development
Databases
Game Development
Programming Languages
Software Development
Cloud Computing
Domain-Specific Languages (DSL)
Hardware Description Languages (HDL)
Aspect-oriented programming
Object-oriented programming
Visual Programming
Competitive Programming
Database Programming
Generic Programming
Programming Language Development
Leetcode
GNU Toolchain
Windsurf
Vibe Coding
View all Programming

Personal Development

Communication Skills
Career Development
Self Improvement
Presentation Skills
Resilience
Self-Control
Creativity
Gratitude
Growth Mindset
Self-Assessment
Survival Skills
Sleep Improvement
Career Planning
Empowerment
Generosity
Personal Growth
Courage
Humility
Social Skills
Dog Training
View all Personal Development

Information Security (InfoSec)

Cybersecurity
Network Security
Ethical Hacking
Digital Forensics
Reverse Engineering
Penetration Testing
Malware Analysis
DevSecOps
OSINT (Open Source Intelligence)
Threat Intelligence
Red Team
Blue Team
View all Information Security (InfoSec)

Inside the Coursera-Udemy Deal: Three Bids, Two Years and a Rival Suitor

Buried in Coursera’s 300-page prospectus: two failed merger attempts, competing bidders, a rogue shareholder, and a combined market cap that shrank from $3.8 billion to $1.7 billion.

Dhawal Shah Apr 07, 2026

Latest

8 Best E-Commerce Courses in 2026: Learn Shopify, Amazon Selling, & more
15 Best R Programming Courses and Books for 2026 (Free & Paid)
8 Best Fortran Courses in 2026 (Free & Paid)
8 Best Watercolor Courses for Beginners for 2026
10 Best Terraform Courses for 2026: Automate Cloud Infrastructure

Write for The Report

Visit The Report

600 Free Google Certifications
Trending

Most common

Popular subjects

Psychology
3,086 courses
Information Technology
6,047 courses
Digital Marketing
7,313 courses

Popular courses

AP® Microeconomics
Massachusetts Institute of Technology
Let's Get Started: Building Self-Awareness
University of Maryland, College Park
Dino 101: Dinosaur Paleobiology
University of Alberta

Organize and share your learning with Class Central Lists.

View our Lists Showcase

Sign up

Log in or Sign up

Log in
Sign up

Institutions
Exposure Ninja

Free Online

Exposure Ninja Courses

160 courses

Showing 160 courses

Sort by Relevancy

Filter by

Filters

Level
1. Intermediate (139)
2. Beginner (21)
Duration
1. < 30 mins (101)
2. 30 - 60 mins (41)
3. 1 - 2 hours (16)
4. 2 - 5 hours (1)
5. 10+ hours (1)
Subject
1. Business (147)
2. Artificial Intelligence (34)
Language
1. English (160)

Five Things That Kill 99% of Conversions - Content Optimization Study

Discover five critical conversion killers that prevent high-ranking pages from generating revenue, with proven fixes that transformed brands like The Ordinary into profit machines.
- YouTube
- 29 minutes
- Self-Paced
- Free Video
How To Do an AI Search Optimization Audit - Step-by-Step Guide

Master AI search optimization with a systematic audit methodology to improve visibility across ChatGPT, Perplexity, and Google's AI Overviews using proven frameworks.
- YouTube
- 21 minutes
- Self-Paced
- Free Video
How to Survive the Zero-Click Search Apocalypse

Master strategies to dominate AI search visibility as zero-click searches reshape digital marketing, turning traffic drops into competitive advantages.
- YouTube
- 23 minutes
- Self-Paced
- Free Video
How to Copy CrowdStrike's $350M/Month SEO Strategy

Discover how CrowdStrike transformed a global IT disaster into explosive SEO growth, turning 8 million crashed computers into 700,000+ monthly searches and $3.44B revenue through strategic content.
- YouTube
- 11 minutes
- Self-Paced
- Free Video
Hidden Playbooks - How B2B SaaS Companies Dominate LLM Results

Uncover data-driven strategies B2B SaaS leaders use to dominate ChatGPT, Claude & Gemini recommendations with real case studies from Rippling, Elementor & others.
- YouTube
- 59 minutes
- Self-Paced
- Free Video
The SEO Shifts That Will Define 2026

Discover the SEO strategies that will dominate 2026, from AI Overviews to trust signals, with actionable insights for navigating the evolving search landscape.
- YouTube
- 1 hour 3 minutes
- Self-Paced
- Free Video
How to Track and Improve Your Brand's Visibility in LLMs

Discover how to monitor and enhance your brand's presence in AI search platforms like ChatGPT using specialized tracking tools and competitive analysis strategies.
- YouTube
- 17 minutes
- Self-Paced
- Free Video
How to Create a Results-Driving B2B Marketing Strategy for 2026

Discover how AI is transforming B2B marketing and learn person-focused strategies, modern buyer journey mapping, and creative tactics to capture higher-value leads in 2026.
- YouTube
- 42 minutes
- Self-Paced
- Free Video
The Best SEO Strategies for 2026

Master AI-driven SEO strategies for 2026, including optimization for ChatGPT and Perplexity, topic clustering, and commercial content integration to dominate search rankings.
- YouTube
- 21 minutes
- Self-Paced
- Free Video
Search Marketing Predictions for 2026 - Historic Changes Coming

Discover bold marketing predictions for 2026 as industry experts reveal historic changes reshaping search marketing strategies and future digital landscapes.
- YouTube
- 53 minutes
- Self-Paced
- Free Video
The 22 Best B2B Lead Generation Strategies for 2026

Discover 22 proven B2B lead generation strategies across all funnel stages, from interactive tools and original research to LinkedIn tactics and re-engagement methods with real examples.
- YouTube
- 40 minutes
- Self-Paced
- Free Video
How SEO Will Work in 2026

Discover how to master both traditional SEO and AI search optimization for 2026, including hybrid strategies, schema markup, digital PR, and AI agent optimization techniques.
- YouTube
- 16 minutes
- Self-Paced
- Free Video
How To Create a Scalable Enterprise Marketing Strategy

Discover how to build marketing strategies that grow with your enterprise, covering scalable frameworks and implementation tactics for sustainable business expansion.
- YouTube
- 40 minutes
- Self-Paced
- Free Video
We Bought a £7M Company to Test Our Marketing Playbook

Discover how a marketing agency proved their strategies by acquiring a £7M company, achieving 5X traffic growth and 250% more leads in 6 months through systematic transformation.
- YouTube
- 21 minutes
- Self-Paced
- Free Video
How to Create a Profitable Paid Search Strategy for 2026

Discover how to build profitable paid search campaigns with expert insights on performance optimization, high-converting ad creative, and effective landing page strategies for 2026.
- YouTube
- 36 minutes
- Self-Paced
- Free Video

Browse by subject

Computer Science
Psychology
Cybersecurity
Health
Law
Accounting
Web Development

Browse by provider

Coursera
Udacity
edX
Noble Desktop
Simplilearn
CodeSignal
Boot.dev

Browse by university

Harvard
MIT
Georgia Tech
University of Michigan
Purdue University
Duke University
IIT Madras

Browse by institution

Google
Microsoft
IBM
Amazon
Linux Foundation
British Council
Salesforce

Best Online Courses of All Time
Best Online Courses of the Year
Most Popular Courses of All Time
Most Popular Courses of the Year
100 Top FREE Coursera Courses of All Time
Best Courses Guides
Free Printable Study Calendar

The Report by Class Central RSS Feed

The "New Normal" that Wasn't
DDoS Attack on Class Central
2000+ Online Degrees in India
Harvard's CS50 Free Certificate Guide
How Open University Works

Free Certificates & Courses

450+ Free Google Certificates
10000+ Free Courses from Tech Giants
300+ Free Coursera Courses
Ivy League Online Courses
200+ Free Writing Online Courses

About Class Central

Class Central aggregates courses from many providers to help you find the best courses on almost any subject, wherever they exist.

Facebook
Twitter
LinkedIn
YouTube
Bluesky

Class Central © 2011-2026 Privacy Policy

About Us
Join Us
Write for Us
Help Center
Contact Us

Share

Facebook
Twitter
Bluesky
Email

Never Stop Learning.

Get personalized course recommendations, track subjects and courses with reminders, and more.

Sign up for free

Someone learning on their laptop while sitting on the floor.