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Chasing 100M Daily Users, Duolingo Reconsiders Ads, Paying Influencers, and Its Most Expensive Plan

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.

Dhawal Shah Sep 03, 2026

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XuetangX is an open online learning platform for Chinese students. It offers massive courses in multiple disciplines, with a mission to build an affordable, quality learning environment for everyone.

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The Path to Becoming a UI Designer

The User Interface (UI) serves as the "first window" to human-computer interaction on smart devices. With the widespread application of various smart devices, the demand for UI design has continually increased.
- XuetangX
- Self-Paced
- Free Online Course
HTML5 Mobile Front-end Development Foundation

Build mobile-oriented front-end pages with HTML5, CSS3, Canvas, SVG, and JavaScript through layout, animation, and interactive carousel projects.
- XuetangX
- Self-Paced
- Free Online Course
C Programming

Learn C programming from the ground up: data types and operators, while and for loops, branching, functions, arrays and pointers, through examples like Fibonacci and magic squares.
- XuetangX
- Self-Paced
- Free Online Course
Management Information Systems

Learn how firms run on information systems: ERP, SCM and CRM applications, relational databases and business intelligence, systems development, IS project management, security and ethics.
- XuetangX
- Self-Paced
- Free Online Course
TIMME: Twitter Ideology-detection via Multi-task Multi-relational Embedding

Detect Twitter ideology using multi-task, multi-relational embedding.
- XuetangX
- Self-Paced
- Free Online Course
The 3rd TBSI Workshop on Learning Theory

A workshop focused on learning theory.
- XuetangX
- Self-Paced
- Free Online Course
Object Oriented Programming(Python)

Build Python projects step by step: variables and flow control, functions and modules, classes with inheritance and polymorphism, file operations, socket networking and a simple web crawler.
- XuetangX
- Self-Paced
- Free Online Course
BIM Practice

Build building information models project by project: create families with extrusion, revolve, sweep and blend, conceptual and in-place masses, roofs, stairs, and camera walkthrough renderings.
- XuetangX
- Self-Paced
- Free Online Course
AI TIME:KDD2021-6

An AI TIME session associated with KDD2021.
- XuetangX
- Self-Paced
- Free Online Course
Fundamentals Of Python Programming

Learn Python from zero: variables and operators, loops, functions and lambda expressions, lists and dictionaries, regular expressions, file and folder operations, classes, modules, and exception handling.
- XuetangX
- Self-Paced
- Free Online Course
AI TIME:KDD2021-5

An AI TIME session associated with KDD2021.
- XuetangX
- Self-Paced
- Free Online Course
AI TIME:KDD2021-4

An AI course associated with KDD2021.
- XuetangX
- Self-Paced
- Free Online Course
AI TIME:KDD2021-7

A course titled “AI TIME:KDD2021-7” with an unspecified focus within artificial intelligence.
- XuetangX
- Self-Paced
- Free Online Course
AI TIME：ICML 2021-6

A course identified as “AI TIME: ICML 2021-6,” with no further instructional focus provided.
- XuetangX
- Self-Paced
- Free Online Course
AI TIME：ICML 2021-5

An artificial intelligence course in the ICML 2021-5 series.
- XuetangX
- Self-Paced
- Free Online Course

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