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 (24) · Intermediate · Course · 1 - 4 Weeks

The University of Edinburgh
Skills you'll gain: Climate Change Programs, Climate Change Mitigation, Climate Change Adaptation, Environmental Issue, Social Impact, Sustainable Development, Mitigation, Environmental Policy, Sustainable Systems, Environment, Social Justice, Sustainable Business, Environmental Science, Community Outreach, Advocacy
★ 4.7 (30) · Beginner · Course · 1 - 3 Months

University of Colorado Boulder
Skills you'll gain: Executive Presence, Succession Planning, Team Performance Management, Team Management, Organizational Structure, Diversity and Inclusion, Delegation Skills, Diversity Equity and Inclusion Initiatives, People Development, Organizational Leadership, Engineering Management, Team Building, People Management, Diversity Awareness, Leadership and Management, Team Leadership, Telecommuting, Talent Management, Leadership, Leadership Development
★ 4.5 (21) · Beginner · Course · 1 - 3 Months

O.P. Jindal Global University
★ 5 (27) · Beginner · Course · 1 - 3 Months

University of Michigan
Skills you'll gain: Social Justice, Environmental Issue, Health Equity, Health Disparities, Environmental Policy, Social Determinants Of Health, Environment Health And Safety, Risk Management, Mitigation, Risk Analysis, Environmental Regulations, Public Health, Health Assessment, Policy Development, Vulnerability
★ 4.9 (24) · Beginner · Course · 1 - 4 Weeks

Logical Operations
Skills you'll gain: Network Troubleshooting, Network Administration, Network Security, Network Architecture, TCP/IP, Network Routers, Computer Networking, Network Routing, Virtual Local Area Network (VLAN), Dynamic Host Configuration Protocol (DHCP), Wireless Networks, Local Area Networks, Network Switches, Networking Hardware, Network Infrastructure, IT Automation, Network Protocols, Routing Protocols, Hardware Troubleshooting, Network Model
★ 4.1 (20) · Beginner · Specialization · 1 - 3 Months

Illinois Tech
Skills you'll gain: Javascript and jQuery, jQuery, Responsive Web Design, Web Development, Version Control, Web Design, Cascading Style Sheets (CSS), Web Design and Development, Hypertext Markup Language (HTML), HTML and CSS, Web Frameworks, GitHub, Web Applications, Javascript, Web Development Tools, Git (Version Control System), Infrastructure Architecture, Network Architecture, Network Infrastructure, Application Frameworks
★ 4.6 (19) · Beginner · Course · 1 - 3 Months

Banco Interamericano de Desarrollo
Skills you'll gain: Climate Change Adaptation, Climate Change Mitigation, Water Sustainability, Climate Change Programs, Water Resource Management, Energy and Utilities, Water Resources, Environmental Policy, Sustainable Business, Risk Management, Environmental Monitoring, Risk Analysis, Environmental Science, International Finance
★ 4.9 (56) · Beginner · Course · 1 - 4 Weeks

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

S.P. Jain Institute of Management and Research
Skills you'll gain: Self-Awareness, Conflict Management, Personal Development, Emotional Intelligence, Personal Attributes, Interpersonal Communications, Collaboration, Relationship Building, Professional Development, Visionary, Leadership, Communication, Dealing With Ambiguity
★ 4.8 (31) · Beginner · Course · 1 - 4 Weeks

Scrimba
Skills you'll gain: Responsive Web Design, User Interface (UI) Design, HTML and CSS, User Interface (UI), Web Design, Figma (Design Software), Typography, Front-End Web Development, Web Design and Development, Graphic and Visual Design, Design Elements And Principles, Maintainability, Mockups, Web Content Accessibility Guidelines, UI Components, Cascading Style Sheets (CSS), Hypertext Markup Language (HTML), Web Development, Web Development Tools, Software Engineering
★ 4.5 (21) · Intermediate · Specialization · 3 - 6 Months

Skills you'll gain: Virtual Networking, Open Shortest Path First (OSPF), Computer Networking, Network Engineering, Network Planning And Design, TCP/IP, General Networking, OSI Models, Wireless Networks, Network Routing, Virtualization and Virtual Machines, Security Controls, Network Switches, Event Monitoring, Local Area Networks, Cloud Infrastructure, Puppet (Configuration Management Tool), IT Automation, Chef (Configuration Management Tool), Real Time Data
★ 4.7 (32) · Intermediate · Specialization · 1 - 3 Months