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.

Johns Hopkins University
Skills you'll gain: Anomaly Detection, Malware Protection, Threat Detection, Network Analysis, AI Security, Cybersecurity, Model Evaluation, Network Security, Machine Learning Methods, Classification Algorithms, Microsoft Windows
★ 4.7 (23) · Intermediate · Course · 1 - 4 Weeks

University of Michigan
Skills you'll gain: Sustainable Development, Sustainable Business, Environmental Policy, Environmental Issue, Environmental Regulations, Environment, Environment and Resource Management, Climate Change Programs, Climate Change Mitigation, Financial Policy, Cost Benefit Analysis, Energy and Utilities, Economics, Oil and Gas, Policy Analysis, Market Dynamics, Public Policies, Decision Making
★ 4.8 (27) · Beginner · Course · 1 - 3 Months

Dassault Systèmes
Skills you'll gain: SolidWorks (CAD), 3D Modeling, Computer-Aided Design, Drafting and Engineering Design, Mechanical Design
★ 5 (26) · Beginner · Course · 1 - 4 Weeks

Whizlabs
Skills you'll gain: Microsoft Azure, Role-Based Access Control (RBAC), Cloud Storage, Data Storage, Identity and Access Management, Data Storage Technologies, Cloud Management, Authorization (Computing), Data Management, Data Access, Data Security, Data Governance, Configuration Management
★ 4.2 (29) · Intermediate · Course · 1 - 4 Weeks

Codio
Skills you'll gain: Algorithms, C++ (Programming Language), C and C++, Data Structures, Theoretical Computer Science, Computer Programming
★ 4.5 (11) · Intermediate · Course · 1 - 4 Weeks

Duke University
Skills you'll gain: Pandas (Python Package), Data Cleansing, Data Manipulation, Data Preprocessing, Data Wrangling, NumPy, File I/O, Query Languages, Data Integration, Python Programming, Debugging
★ 4.3 (16) · Beginner · Course · 1 - 4 Weeks

Skills you'll gain: Adobe Photoshop, Photo Editing, Editing, Data Import/Export, Image Quality, Embeddings, Graphic Design, File Management
Intermediate · Guided Project · Less Than 2 Hours

Skills you'll gain: Object Oriented Programming (OOP), Object Oriented Design, Software Documentation, Java Programming, Java, Technical Documentation, Computer Programming, Programming Principles, Code Reusability, Computer Science
★ 4.2 (22) · Intermediate · Course · 1 - 4 Weeks

Board Infinity
Skills you'll gain: Cascading Style Sheets (CSS), Web Design and Development, digital literacy, Web Content Accessibility Guidelines
★ 4.5 (26) · Beginner · Course · 1 - 4 Weeks

University of Colorado Boulder
Skills you'll gain: Robotics, Graph Theory, Algorithms, Python Programming
★ 4.4 (18) · Intermediate · Course · 1 - 3 Months

Coursera
Skills you'll gain: Cascading Style Sheets (CSS), Responsive Web Design, Browser Compatibility, Hypertext Markup Language (HTML), HTML and CSS, Web Development Tools, Web Design, Web Development
★ 4.7 (63) · Intermediate · Guided Project · Less Than 2 Hours

Amazon Web Services
Skills you'll gain: Command-Line Interface, Network Troubleshooting, Linux Commands, Linux, Linux Servers, Technical Support and Services, Linux Administration, Technical Support, Network Infrastructure, Amazon Web Services, File Management, Remote Access Systems, Network Protocols, Network Security, Operating Systems, Package and Software Management, System Configuration, DevOps, Communication
★ 4.8 (26) · Beginner · Course · 1 - 4 Weeks