HTML, CSS, and JavaScript courses can help you learn web page structure, styling, and interactivity, along with responsive design and accessibility practices. You can build skills in creating layouts, implementing animations, and optimizing user experiences across different devices. Many courses introduce tools like code editors, version control systems, and browser developer tools, that support testing and refining your projects. By mastering these skills and tools, you’ll be well-equipped to develop engaging websites and applications.

Arizona State University
Skills you'll gain: Sustainable Development, Sustainability Reporting, Waste Minimization, Sustainability Standards, Interactive Learning, Sustainable Business, Sustainable Architecture, Sustainable Technologies, Corporate Sustainability, Training Programs, Construction, Student Engagement, Environmental Issue, Key Performance Indicators (KPIs), Environmental Engineering, Goal Setting, Climate Change Adaptation, Problem Solving, Professional Development, Business Communication
Beginner · Course · 1 - 3 Months

Johns Hopkins University
Skills you'll gain: Apache Hadoop, File Systems, Big Data, Data Infrastructure, Java, Data Structures, File Management, Systems Architecture, Data Processing, Distributed Computing, Data Storage, Development Environment, Scalability
Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Electrical Substation, Electric Power Systems, High Voltage, Electrical Systems, Electrical Power, Electrical Equipment, Electrical Safety, Electrical Engineering, Control Systems, Automation Engineering, Artificial Neural Networks
Mixed · Course · 1 - 3 Months

National Academy of Sports Medicine
Skills you'll gain: Nutrition Education, Nutrition and Diet, Patient Education And Counseling, Clinical Nutrition, Food Quality Assurance And Control, Scientific Methods, Medical Science and Research, Life Sciences
Beginner · Course · 1 - 4 Weeks

University of Virginia
Skills you'll gain: Public History, Writing, Storytelling, Writing and Editing, World History, European History, Oral Expression, Creativity
Beginner · Course · 1 - 3 Months

O.P. Jindal Global University
Skills you'll gain: Systems Thinking, Complex Problem Solving, Policy Analysis, Public Policies, Health Policy, Climate Change Programs, Program Evaluation, Political Sciences, Sustainable Development, Economic Development, Social Sciences, Economics, Ethical Standards And Conduct, Computational Thinking, Data Storytelling, Innovation, Decision Making
Build toward a degree
Beginner · Course · 1 - 3 Months

University of Colorado System
Skills you'll gain: Unified Modeling Language, Unit Testing, Software Design, Data Flow Diagrams (DFDs), Object Oriented Design, Software Engineering, Software Development Tools, Software Testing, Program Development, Software Architecture, Ethical Standards And Conduct, Algorithms
Intermediate · Course · 1 - 3 Months

Skills you'll gain: Data Dictionary, Data Quality, Data Management, Data Cleansing, Data Validation, Data Governance, Data Integrity, Case Studies, Communication Strategies, Stakeholder Communications, Cross-Functional Collaboration, Continuous Improvement Process
Beginner · Course · 1 - 4 Weeks

Edureka
Skills you'll gain: API Gateway, Authentications, Application Programming Interface (API), OAuth, API Design, Cloud API, Authorization (Computing), Secure Coding, API Testing, Restful API, Threat Modeling, Application Security, Data Security, Distributed Denial-Of-Service (DDoS) Attacks, Identity and Access Management, Encryption, Prometheus (Software), Flask (Web Framework), Grafana, Python Programming
Beginner · Course · 1 - 4 Weeks

LearnQuest
Skills you'll gain: Network Architecture, Network Protocols, Wireless Networks, Network Performance Management, Network Planning And Design, Network Infrastructure, Communication Systems, Telecommunications, Emerging Technologies
Intermediate · Course · 1 - 4 Weeks

University of Florida
Skills you'll gain: Land Management, Sustainable Development, Sustainable Systems, Water Resource Management, Water Resources, Sustainability Standards, Environment and Resource Management, Environment, Environmental Science, Natural Resource Management, Systems Thinking, Biology
Intermediate · Course · 1 - 4 Weeks

University of Colorado System
Skills you'll gain: Estimation, Applied Mathematics, Numerical Analysis, Mathematical Modeling, Control Systems, Mathematical Software, Simulation and Simulation Software, Model Evaluation, Derivatives, Calculus, Computer Programming Tools
Intermediate · Course · 1 - 4 Weeks