Courses from 1000+ universities
17 years ago, Krishna Kumar started offering free PMP prep online. Today, it’s a leading digital upskilling platform that helps millions upskill in AI, cybersecurity, data science, and more.
600 Free Google Certifications
Cyber Security
Bacterial Genomes II: Accessing and Analysing Microbial Genome Data Using Artemis
Internet History, Technology, and Security
Organize and share your learning with Class Central Lists.
View our Lists Showcase
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.
Explore evidence-based strategies for children's myopia prevention, covering epidemiology, eye exams, behavioral, optical, and pharmacological interventions, plus public health communication for schools and families.
Master English technical writing for ICT fields—develop user-focused, structured, and precise documentation skills to produce professional, deliverable content for global audiences.
Learn to communicate technology clearly and professionally. This course teaches you how to transform complex technical ideas into clear, structured, and user-friendly English documents used in global ICT and engineering environments.
Learn the full software lifecycle from a DevOps perspective, covering agile, version control, microservices, CI/CD, cloud-native technologies, and AI in software engineering. Clear, beginner-friendly, and a practical path to modern software engineering.
Explore fundamental immunological principles and clinical applications, covering immune system structure, antibodies, complement, cytokines, and disease mechanisms for medical students.
Do you want to be a "eye-tailored" vision magician?Do you want to use corneal curvature data to accurately calculate the suitable base curve?Do you want to identify astigmatism types at a glance and create a comfortable, clear "invisible window" for pati…
Master drug quality evaluation methods, analytical techniques, and regulatory standards throughout the pharmaceutical lifecycle from development to clinical use.
Explore wave properties of light through interference, diffraction, and polarization while mastering light-matter interactions and optical engineering applications.
Master consecutive interpreting fundamentals through memory training, note-taking techniques, and cross-cultural communication skills for professional accuracy.
Explore advanced petroleum reservoir engineering principles including rock-fluid properties, material balance equations, performance prediction, and multiphase displacement for oil field development.
掌握流体力学基本概念、理论和分析方法,提升解决石油工业复杂流体系统流动问题的能力,涵盖涡量动力学、势流理论、水波、粘性流动和边界层流动等核心内容。
Master Vue.js and Element Plus to build dynamic web applications with component development, routing, and network requests for professional front-end development skills.
Master essential automotive maintenance skills from basic tools and tire care to engine systems and chassis components for comprehensive vehicle upkeep expertise.
Explore the future of online education through engaging dialogues, discussions, and insights shaping the 2026 landscape of digital learning.
Explore the properties, preparation, processing, and safety of powdered materials across industries like pharmaceuticals, metallurgy, and energy in this multidisciplinary powder engineering overview.
Get personalized course recommendations, track subjects and courses with reminders, and more.