Class Central

Rankings
Career Certificates

Subjects

View all

Technology
Business
Creative
STEM
Health & Wellness
People & Society
Personal Growth & Lifestyle

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

Career Certificates

Generative AI
UX Design
Data Science
Finance
DevOps
Project Management
View all Career Certificates

Technology

Computer Science
Artificial Intelligence
Data Science
Web Development
Programming
Databases
IT & Networking
DevOps
UX/UI Design
Blockchain & Cryptocurrency
Extended Reality (XR)
Generative AI
Cloud Computing
Cybersecurity
Game Development
Product Management
View all Technology

Business

Management & Leadership
Finance
Entrepreneurship
Marketing
Strategic Management
Project Management
Sales
Business Software
Real Estate
Professional Development
Accounting
Supply Chain Management
Business Strategy
Human Resources
View all Business

Creative

Music
Digital Media
Visual Arts
Design
Crafts
Performing Arts
AI Art
View all Creative

STEM

Mathematics
Engineering
Science
Statistics & Probability
Chemistry
Physics
Environmental Science
Astronomy
Biology
Agriculture
View all STEM

Health & Wellness

Disease & Disorders
Public Health
Health Care
Nursing
Mental Health
Continuing Medical Education (CME)
Medicine
Wellness
Nutrition
View all Health & Wellness

People & Society

Humanities
Education & Teaching
Social Sciences
History
Literature
Sociology
Economics
Psychology
Anthropology
Political Science
Law
Language Learning
Writing
Philosophy
Religion
View all People & Society

Personal Growth & Lifestyle

Personal Development
Sports & Recreation
Personal Finance
Parenting & Family
Food & Drink
Self-Defense & Martial Arts
Gardening
Productivity & Time Management
Games
Study Skills
Travel
Pets & Pet Care
Beauty & Makeup
Home & Living
Critical Thinking
View all Personal Growth & Lifestyle

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

Latest

[2026] 17% of Coursera Courses Have Peer Reviews: Here Are the Best
7 Best Online First Aid Courses and Sites for 2026: CPR, AED, and Emergency Response
7 Best Node.js Courses in 2026: Build APIs in JavaScript
12 Best Data Analysis Courses for 2026: From Data to Insights
Coursera’s Hidden Free-Access Courses (and What’s Actually Free About Them)

Write for The Report

Visit The Report

600 Free Google Certifications
Trending

Most common

Popular subjects

Artificial Intelligence
17,507 courses
Data Science
11,440 courses
Cybersecurity
14,270 courses

Popular courses

L'Italiano nel mondo
University of Naples Federico II
Introduction to HTML5
University of Michigan
Umano Digitale
University of Urbino

Organize and share your learning with Class Central Lists.

View our Lists Showcase

Sign up

Log in or Sign up

Log in
Sign up

Universities
Jining University

Free Online

Jining University Courses

19 courses

Showing 19 courses

Sort by Relevancy

Filter by

Filters

1. Free course (19)
2. From universities (19)
Level
1. Beginner (11)
2. Intermediate (8)
Duration
Subject
1. STEM (12)
2. People & Society (5)
3. Technology (2)
Language
1. Chinese (19)

解析几何


以向量与坐标方法研究平面和空间中的直线、曲面及二次曲线，训练几何直观、空间想象与逻辑推理能力。
- XuetangX
- Self-Paced
- Free Online Course
概率论与数理统计


系统讲授概率论与数理统计，从随机事件和随机变量到参数估计、假设检验与置信区间。
- XuetangX
- Self-Paced
- Free Online Course
无机及分析化学


系统贯通化学原理、元素化学与经典分析方法，建立从原子结构到滴定和重量分析的基础。
- XuetangX
- Self-Paced
- Free Online Course
原子物理学


本课程内容采用模块化专题化创新设计，带领大家探寻物质奥秘，解密微观世界运行规则，了解现代科技应用，一同感受“诺贝尔奖”和“科技创新”的盛宴，玩转“原宇宙”。
- XuetangX
- Self-Paced
- Free Online Course
基因工程实验


系统讲解基因工程实验的技术原理与操作，涵盖载体构建、目的基因获取、细胞转化及阳性转化子鉴定。
- XuetangX
- Self-Paced
- Free Online Course
酶工程


系统学习酶制剂生产与分离纯化，并掌握酶分子修饰、定向进化、固定化和非水相催化等工程技术。
- XuetangX
- Self-Paced
- Free Online Course
魅力微积分II

将多元微积分与向量微积分结合，系统学习偏导、重积分、曲线曲面积分及无穷级数。
- XuetangX
- Self-Paced
- Free Online Course
无机化学下


以无机化学基本原理统摄元素化学，系统考察s、p、d、ds与f区元素及其化合物的结构、性质和应用。
- XuetangX
- Self-Paced
- Free Online Course
生物化学实验


通过离心、比色、层析和电泳等实验，分析糖、蛋白质、核酸和酶的化学性质、分离与定量。
- XuetangX
- Self-Paced
- Free Online Course
Unity 3D基础


本课程针对Unity初学者的特点和需求，本着“起点低，终点高”的原则进行教学设计，力求以实用为宗旨，基于企业级项目规范设计的案例来贯穿讲解，培养游戏作品的设计能力。
- XuetangX
- Self-Paced
- Free Online Course
机械原理


系统学习机构结构、运动与力分析，以及连杆、凸轮和齿轮机构的设计方法。
- XuetangX
- Self-Paced
- Free Online Course
马克思主义基本原理


系统学习马克思主义哲学、政治经济学和科学社会主义，理解社会发展规律并运用马克思主义分析实际问题。
- XuetangX
- Self-Paced
- Free Online Course
外国文学


系统梳理古代至当代外国文学思潮、流派与经典作品，结合原典阅读和问题分析提升文学鉴赏与研究能力。
- XuetangX
- Self-Paced
- Free Online Course
语言导论


以一课一问一答的方式，系统揭示语言学的核心概念与语言学习现象。
- XuetangX
- Self-Paced
- Free Online Course
教师语言


面向师范生，训练科学发声、普通话语音与课堂教学中的生动语言表达。
- XuetangX
- Self-Paced
- Free Online Course

Career Certificates

Generative AI
UX Design
Data Science
Finance
DevOps
Project Management
All Subjects

Coursera
Udemy
Noble Desktop
Simplilearn
CodeSignal
Boot.dev
All Universities

The Report by Class Central RSS Feed

Series Finale of Online Education
Udemy Earns More, Pays Less
Duolingo's 2026 Strategy
1000s of Free Certificates
Best Courses Guides
Best of All Time
Most Popular of All Time

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.