First aid courses can help you learn how to recognize common emergencies, understand basic response principles, and communicate effectively with trained professionals. You can build skills in identifying signs of illness or injury, assessing situations safely, and applying general preparedness concepts. Many courses introduce frameworks, scenario-based learning, and tools that support building confidence in responding to unexpected events.

ISSA (International Sports Sciences Association)
Skills you'll gain: Nutrition Counseling, Nutrition and Diet, Clinical Nutrition, Nutrition Education, Nutritional Assessment, Exercise Science, Health And Wellness Coaching, Coaching, Health Assessment, Health Education, Biochemistry, Psychology, Physiology, Mental and Behavioral Health, Athletic Training, Health Care, Adaptability
Beginner · Course · 1 - 3 Months

JetBrains
Skills you'll gain: Application Development, Application Deployment, Generative AI Agents, Large Language Modeling, Software Development Tools, LLM Application, AI literacy, IntelliJ IDEA, Agentic Workflows, Artificial Intelligence and Machine Learning (AI/ML), Generative AI, Integrated Development Environments, Agentic systems, Code Review, Software Development, Software Development Life Cycle
★ 3.3 (9) · Beginner · Course · 1 - 3 Months

Scrimba
Skills you'll gain: Cascading Style Sheets (CSS), HTML and CSS, Front-End Web Development, Javascript, Responsive Web Design, Maintainability
★ 4.7 (12) · Intermediate · Course · 1 - 4 Weeks

L&T EduTech
Skills you'll gain: Structural Analysis, Building Codes, Structural Engineering, Civil Engineering, Engineering Analysis, Simulation and Simulation Software, Engineering Practices, Drafting and Engineering Design, Design Specifications, Engineering Design Process, Engineering Calculations, Planning
★ 4.6 (8) · Intermediate · Course · 1 - 3 Months

Skills you'll gain: Blockchain, FinTech, Application Development, Emerging Technologies, Integrated Development Environments, Other Programming Languages, Program Development, Secure Coding, Data Structures, Data Mapping
★ 4.4 (7) · Intermediate · Course · 1 - 3 Months

University of Leeds
Skills you'll gain: Web Development, HTML and CSS, Web Content Accessibility Guidelines, Hypertext Markup Language (HTML), Front-End Web Development, Full-Stack Web Development, Data Security, Back-End Web Development, Cascading Style Sheets (CSS), Javascript, Information Privacy, Computer Architecture
Beginner · Course · 1 - 4 Weeks

Interactive Brokers
Skills you'll gain: Investments, Portfolio Risk, Portfolio Management, Risk Management, Investment Management, Equities, General Finance, Securities Trading, Market Trend, Market Opportunities, Performance Analysis, Stock Rotation, Business Economics, Market Dynamics, Market Analysis
Beginner · Course · 1 - 4 Weeks
Skills you'll gain: Management Training And Development, Trustworthiness, Team Building, Team Performance Management, Team Leadership, Team Management, Leadership and Management, Rapport Building, Employee Onboarding, Team Collaboration, Organizational Leadership, Leadership, Leadership Development, People Management, Employee Coaching, Drive Engagement, Recognizing Others, Coaching, Planning, Communication
★ 5 (6) · Beginner · Course · 1 - 4 Weeks

Skills you'll gain: Storytelling, Writing and Editing, Writing, Creativity
Beginner · Course · 1 - 4 Weeks

Skills you'll gain: Browser Compatibility, Responsive Web Design, UI Components, HTML and CSS, Hypertext Markup Language (HTML), Web Design and Development, Web Design, Web Content Accessibility Guidelines, Extensible Markup Language (XML), Cascading Style Sheets (CSS), Semantic Web, Verification And Validation, Interactive Design, User Interface (UI), Typography, Web Development Tools, Usability, Web Language, Web Development, Extensible Languages and XML
★ 4.9 (45) · Beginner · Specialization · 3 - 6 Months

Johns Hopkins University
Skills you'll gain: Algebra, Graphing, Advanced Mathematics, Logical Reasoning, Applied Mathematics, Mathematical Modeling, Visualization (Computer Graphics), Correlation Analysis, Predictive Modeling
Beginner · Course · 1 - 4 Weeks

Skills you'll gain: Animations, Adobe After Effects, File Management, Motion Graphics, Timelines, Graphics Software, Control Panels
Mixed · Course · 1 - 4 Weeks