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.

Skills you'll gain: User Interface (UI) Design, Mobile Development, User Interface and User Experience (UI/UX) Design, React Native, Apple iOS, UI Components, Database Application, Android Development, iOS Development, Mobile Development Tools, Application Development, Databases, Cloud Applications, Database Software, Database Management, Database Management Systems, Flutter (Software), Application Design, Application Deployment, Back-End Web Development
★ 4.6 (14) · Intermediate · Course · 1 - 3 Months

Johns Hopkins University
Skills you'll gain: Business Ethics, Leadership Studies, Ethical Standards And Conduct, Diversity and Inclusion, Organizational Leadership, Initiative and Leadership, Business Leadership, Team Leadership, Responsible AI, Artificial Intelligence, Decision Making, Leadership, Cultural Diversity, Leadership Development, Accountability
★ 4.3 (18) · Beginner · Course · 1 - 3 Months

Skills you'll gain: Object Oriented Programming (OOP), Object Oriented Design, Java Programming, Code Reusability, Java, Computer Programming, Data Validation, Data Integrity, Computer Science
★ 4.1 (21) · Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Context Engineering, Agentic Workflows, AI Orchestration, Tool Calling, Generative AI, Gemini, Artificial Intelligence, Google Gemini, Retrieval-Augmented Generation, Model Optimization, Embeddings, Workflow Management, Python Programming, Data Validation
★ 3.7 (9) · Beginner · Course · 1 - 4 Weeks

Pearson
Skills you'll gain: Virtual Local Area Network (VLAN), Network Security, Network Troubleshooting, Dynamic Host Configuration Protocol (DHCP), Network Architecture, TCP/IP, Routing Protocols, Network Switches, Network Routing, Open Shortest Path First (OSPF), Wireless Networks, Network Support, Network Routers, Virtual Networking, Ansible, General Networking, Network Infrastructure, Software-Defined Networking, Network Planning And Design, Virtual Private Networks (VPN)
★ 4.1 (22) · Beginner · Specialization · 1 - 3 Months

Coursera
Skills you'll gain: Application Design, Application Development, UI Components, Event-Driven Programming, Integrated Development Environments, Java Programming, User Interface (UI), Java, User Interface (UI) Design, Application Frameworks
★ 4.4 (22) · Intermediate · Guided Project · Less Than 2 Hours

Skills you'll gain: Employee Surveys, Employee Engagement, User Feedback, Performance Measurement, Microsoft 365, Performance Analysis, Business Research, Customer experience improvement, Customer Insights, Analysis, Customer Analysis, Market Research, User Research, Business Strategy
★ 4.4 (25) · Beginner · Guided Project · Less Than 2 Hours

University of Colorado Boulder
Skills you'll gain: Environmental Monitoring, Physical Science, Physics, Environmental Science, Environment, Engineering, Scientific, and Technical Instruments, General Science and Research, Life Sciences, electromagnetics, Scientific Methods, Research
★ 4.2 (29) · Beginner · Course · 1 - 3 Months

University of Illinois Urbana-Champaign
Skills you'll gain: Deep Learning, Generative AI, Generative Model Architectures, Applied Machine Learning, Machine Learning Methods, Graph Theory, Network Analysis, Artificial Neural Networks, Network Model, Health Informatics, Laboratory Experience, Autoencoders, Predictive Modeling, Unsupervised Learning, Data Synthesis
★ 3.5 (16) · Advanced · Course · 1 - 4 Weeks

Board Infinity
Skills you'll gain: Test Planning, Configuration Management, Risk Management
★ 4.8 (28) · Beginner · Course · 1 - 4 Weeks

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

University of Michigan
Skills you'll gain: Data Mining, Unsupervised Learning, Data Science, Anomaly Detection, Machine Learning Methods, Statistical Methods, Linear Algebra, Python Programming, Classification Algorithms
★ 4.7 (13) · Advanced · Course · 1 - 4 Weeks