Courses from 1000+ universities
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.
600 Free Google Certifications
Programming
Cybersecurity
Digital Marketing
Sustainable Tourism: Society & Environmental Aspects
Introducción a la inversión bursátil
Industrial Pharmacy-I
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.
Practical training for urban rail transit operations, covering emergency response, ticketing, platform-door troubleshooting, signaling, and environmental control.
Learn spoken English through Chinese ceramics, from materials, techniques, and firing to Jingdezhen porcelain styles and their connections to tea and food culture.
Study parasites and parasitic diseases in domestic and wild animals, from biology and epidemiology through diagnosis, prevention, and treatment.
Introduces classical analytical chemistry through titration and gravimetric methods, emphasizing quantitative calculations, data processing, and method evaluation.
Explore wireless sensor network architecture, communication protocols, deployment, topology control, synchronization, energy management, and data processing.
Overview of the complete shipbuilding system, from ship design and hull construction through outfitting, onboard systems, painting, launching, testing, and delivery.
Learn sensor principles, calibration, measurement circuits, and engineering applications to design and optimize testing systems for specific requirements.
Project-based practice in reading and drawing architectural construction plans, elevations, sections, details, structural drawings, and building-services diagrams.
Learn to plan machining and assembly processes, analyze dimensional chains, and achieve accuracy and surface quality when processing shafts, sleeves, boxes, and gears.
Covers statics and mechanics of materials, from force equilibrium through stress, strain, beam deflection, composite deformation, and columns.
Analyze folds, faults, and basin evolution through stereonets, seismic interpretation, and kinematic models of fault-related folding.
Hands-on 51 microcontroller development through practical projects involving C programming, hardware interfaces, displays, timers, interrupts, serial communication, and A/D-D/A conversion.
Railway operations training for managing train arrivals and departures when track circuits, switches, or signals fail.
Explores metallic materials, heat treatment, casting, forging, and welding to support material selection and process analysis for mechanical parts.
Learn foundational electrical and electronic technology through hands-on work with DC/AC circuits, residential power systems, three-phase motors, safety, and rectifier-based devices.
Get personalized course recommendations, track subjects and courses with reminders, and more.