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
IT & Networking
Software Engineering
AI Engineering
Astronomy: Exploring Time and Space
Chinese for Beginners
Supporting Victims of Domestic Violence
Organize and share your learning with Class Central Lists.
View our Lists Showcase
Explore passive cooling techniques, HVAC systems, integrative building design, and efficient equipment with Amory Lovins, learning how to achieve extreme energy efficiency and multiple benefits through whole-systems thinking.
Explore integrative design methodology and whole systems thinking to achieve extreme energy efficiency, with insights on economic growth, natural systems, and the transition from fuel commodities to energy technologies.
Explore Amory Lovins' energy-efficient home and passive-solar banana farm in Snowmass, CO, featuring innovative heating, insulation, water systems, and integrative design principles for extreme resource efficiency.
Discover integrative design principles for creating superefficient buildings through whole-systems approaches that maximize energy savings while reducing costs. Learn from real examples, retrofitting strategies, and innovative business models for extreme…
Explore geothermal energy fundamentals, technology, economics, and future trends with Dawn Owens, covering how it works, development processes, market dynamics, and promising innovations.
Discover how Amory Lovins inspires the next generation through parables and a positive vision of the future in this commencement address to Olin College's engineering graduates.
Discover the science-backed benefits of protein, fiber, and hydration for energy, satiety, and digestion. Learn practical strategies to incorporate these nutritional powerhouses into your daily routine for improved wellness and weight management.
Learn strategies to manage nutrition-related side effects during cancer treatment, including appetite changes, nausea, vomiting, diarrhea, constipation, and gas/bloating.
Explore how to transform AI evaluation from benchmark-based testing to a rigorous measurement science, applying psychometric principles to improve reliability and relevance in critical AI deployments.
Discover how automated progress note generation from EHR data can reduce clinician burden, as Dr. Sarvesh Soni presents a novel framework using LLMs to process structured patient data while addressing privacy concerns.
Discover how Medicare Supplement Insurance (Medigap) can reduce your healthcare costs, understand enrollment windows, and learn to make informed decisions with guidance from a HICAP counselor.
Discover how Medicare interacts with employer health plans when working past 65, including transition strategies, avoiding HSA contribution issues, and COBRA coordination to ensure informed healthcare decisions.
Learn how to effectively communicate with your doctor about cardiovascular risks as a South Asian, with specific questions to ask and strategies for advocating for personalized care based on your ethnic background.
Learn to transform traditional Thanksgiving sides into nutritious, flavorful dishes with expert guidance from a registered dietitian. Master healthy ingredient swaps and cooking techniques for reimagined holiday classics.
Discover how psyllium fiber can help manage metabolic syndrome, reduce heart disease risk, and improve overall health outcomes through evidence-based insights from Stanford medicine.
Get personalized course recommendations, track subjects and courses with reminders, and more.