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.

American Psychological Association
Skills you'll gain: Statistical Hypothesis Testing, Sample Size Determination, Probability & Statistics, Probability Distribution, Statistical Methods, Quantitative Research, Statistical Inference, Statistics, Sampling (Statistics), Statistical Analysis, Probability, Scientific Methods, Data Analysis, Research, Psychology
Beginner · Course · 1 - 3 Months

Dartmouth College
Skills you'll gain: Kinesiology, Human Musculoskeletal System, Scientific Methods, Science and Research, Anthropology, Biology, Anatomy, 3D Assets, Research, Mechanics, Physiology, Human Development, Exercise Science, Taxonomy, Child Development, Life Sciences, Scientific Visualization, Childbirth, Obstetrics And Gynecology, Orthopedics
★ 4.6 (10) · Beginner · Specialization · 1 - 3 Months

Skills you'll gain: Routing Protocols, Virtual Networking, Network Routing, Network Architecture, Hybrid Cloud Computing, Network Planning And Design, Amazon Web Services, Virtual Private Networks (VPN), General Networking, Network Infrastructure, Network Administration, Network Performance Management, Network Security, Cloud Infrastructure, Cloud Computing, Network Analysis, Security Controls, Operations Management
Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: UI Components, Responsive Web Design, Code Reusability, Web Development Tools, Application Deployment, Database Management, Web Applications, Data Store, Databases, Frontend Integration, Authentications, Application Development, JavaScript Frameworks, Email Automation, Restful API, Web Design, Front-End Web Development, TypeScript, Application Programming Interface (API), Web Language
★ 5 (6) · Intermediate · Specialization · 1 - 3 Months

Logical Operations
Skills you'll gain: Object Oriented Programming (OOP), Object Oriented Design, Code Reusability, Maintainability, Programming Principles, Computer Programming, Python Programming, Software Development
Mixed · Course · 1 - 4 Weeks

Board Infinity
Skills you'll gain: CI/CD, Jenkins, Docker (Software), Continuous Integration, Containerization, Cloud-Native Computing, Scalability, Application Deployment, Cloud Deployment, Continuous Deployment, Spring Framework, Spring Boot, DevOps, Prometheus (Software), Amazon CloudWatch, AWS Identity and Access Management (IAM), Identity and Access Management, Load Balancing, OAuth, Performance Tuning
Advanced · Course · 1 - 4 Weeks

Skills you'll gain: Network Planning And Design, Microsoft Azure, Network Security, Network Troubleshooting, Network Architecture, Network Support, Network Administration, IT Security Architecture, Security Engineering, Firewall, Network Monitoring, Virtual Private Networks (VPN), Virtual Networking, Network Routing, Role-Based Access Control (RBAC), General Networking, Network Performance Management, Hybrid Cloud Computing, Data Migration
★ 5 (32) · Intermediate · Course · 1 - 4 Weeks

Scrimba
Skills you'll gain: Responsive Web Design, UI Components, Cascading Style Sheets (CSS), HTML and CSS, Web Design, Front-End Web Development, User Interface (UI), User Interface (UI) Design, Web Design and Development, Debugging, Web Development
★ 4.7 (7) · Intermediate · Course · 1 - 4 Weeks

Infosec
Skills you'll gain: Distributed Denial-Of-Service (DDoS) Attacks, Secure Coding, Application Security, Encryption, Security Controls, Data Security, Endpoint Security, Database Application, Web Applications, Cryptography, Object-Relational Mapping, Authentications, Data Access, Query Languages, Computer Programming
★ 4.4 (9) · Beginner · Course · 1 - 4 Weeks

University of California, Davis
Skills you'll gain: Responsive Web Design, HTML and CSS, Web Design, Cascading Style Sheets (CSS), GitHub, Front-End Web Development, Application Deployment, Web Development, User Interface (UI) Design
★ 4.8 (9) · Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Graphics Software, Digital Design, Design Software, Graphical Tools, Design Elements And Principles, Computer Graphic Techniques, Creativity, Peripheral Devices
Beginner · Course · 1 - 4 Weeks

Skills you'll gain: IntelliJ IDEA, Apache Maven, Build Tools, Data Import/Export, Kotlin, Software Installation, Unit Testing, Software Development, Java, Software Testing, Database Management
★ 4.8 (19) · Beginner · Course · 1 - 4 Weeks