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.

Johns Hopkins University
Skills you'll gain: Editing, Student-Centred Learning, Writing and Editing, Student Engagement, Teaching, Instructional Strategies, Peer Review, Writing
Beginner · Course · 1 - 4 Weeks

Skills you'll gain: Incident Response, Computer Security Incident Management, Open Web Application Security Project (OWASP), Application Security, Secure Coding, Cloud Security, Cybersecurity, Vulnerability Assessments, Cyber Attacks, Information Systems Security, Security Engineering, Metasploit, Security Strategy, Infrastructure Security, Incident Management, Vulnerability Scanning, Security Testing, Hardening, Penetration Testing, Mobile Security
Advanced · Course · 1 - 3 Months

Skills you'll gain: Rust (Programming Language), Data Structures, Package and Software Management, Maintainability, Algorithms, Software Testing, Unit Testing, Software Design Patterns, Development Testing
Intermediate · Course · 1 - 3 Months

Skills you'll gain: Verbal Communication Skills, Oral Comprehension, English Language, Vocabulary, Language Learning, Communication, Grammar
Beginner · Course · 1 - 3 Months

National Academy of Sports Medicine
Skills you'll gain: Nutrition and Diet, Nutrition Counseling, Preventative Care, Public Health and Disease Prevention, Nutritional Assessment, Health And Wellness Coaching, Exercise Science, Physiology, Biology, Anatomy, Communication
Beginner · Course · 1 - 3 Months

Skills you'll gain: Feature Engineering, Dimensionality Reduction, Data Integration, Data Preprocessing, Exploratory Data Analysis, Data Visualization, Plot (Graphics), Matlab, Data Processing, Data Cleansing, Data Manipulation, Text Mining, Predictive Modeling, Unstructured Data, Image Analysis, Natural Language Processing
Intermediate · Course · 1 - 3 Months

Skills you'll gain: Cloud Deployment, Amazon Web Services, Cloud Management, System Monitoring, Network Monitoring, Application Performance Management, Scalability, Cloud Computing, Performance Tuning, Security Testing, Data Maintenance
Advanced · Course · 1 - 4 Weeks
University of Illinois Urbana-Champaign
Skills you'll gain: Tax Preparation, Tax Returns, Income Tax, Payroll Tax, Tax, Tax Laws, Payroll, Revenue Recognition, Expense Management, Compensation and Benefits
Build toward a degree
Intermediate · Course · 1 - 3 Months

Skills you'll gain: Restful API, Application Programming Interface (API), Node.JS, Software Documentation, Web Services, Middleware, Authentications, JSON, Web Frameworks, Server Side, Web Applications, Back-End Web Development, Authorization (Computing)
Mixed · Course · 1 - 4 Weeks

University of Pennsylvania
Skills you'll gain: Creative Thinking, Creativity, Creative Problem-Solving, Ideation, Innovation, Architectural Design, Problem Solving, Design Thinking, Artificial Intelligence and Machine Learning (AI/ML), Entrepreneurship, Artificial Intelligence, Advertising, Marketing, Game Design, Consumer Behaviour, Experimentation
Beginner · Course · 1 - 3 Months
University of Illinois Urbana-Champaign
Skills you'll gain: Organizational Change, Innovation, Change Management, New Product Development, Organizational Strategy, Cross-Functional Team Leadership, Team Leadership, Organizational Effectiveness, Product Lifecycle Management, Organizational Structure, Emerging Technologies, Business Strategy
Beginner · Course · 1 - 4 Weeks

Skills you'll gain: File I/O, Object Oriented Programming (OOP), C++ (Programming Language), Data Structures, Object Oriented Design, Software Design Patterns, Programming Principles, Data Persistence, Algorithms, Simulations
Advanced · Course · 1 - 4 Weeks