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.

Universiteit Leiden
Skills you'll gain: Predictive Analytics, Predictive Modeling, Model Evaluation, Risk Modeling, R Programming, Preventative Care, Statistical Modeling, Sample Size Determination, Regression Analysis, Precision Medicine, Data Preprocessing, Applied Machine Learning, Sampling (Statistics), Diagnostic Tests
★ 4.6 (25) · Intermediate · Course · 1 - 3 Months

Logical Operations
Skills you'll gain: Routing Protocols, Network Routing, Virtual Local Area Network (VLAN), TCP/IP, Network Administration, Network Switches, General Networking, Network Architecture, OSI Models, Network Routers, Network Planning And Design, Network Engineering, Local Area Networks, Networking Hardware, Computer Networking, Network Infrastructure, Network Model, Network Protocols, Command-Line Interface
★ 3.9 (18) · Mixed · Course · 1 - 3 Months

Skills you'll gain: User Research, UI/UX Research, User Interface and User Experience (UI/UX) Design, User Interface (UI), User Experience, UI/UX Strategy, Persona (User Experience), User Centered Design, Usability, User Flows, User Interface (UI) Design, Responsive Web Design, Graphic and Visual Design, Interactive Design, Interaction Design, Layout Design, Design Elements And Principles, Typography, Prototyping
★ 4.3 (18) · Beginner · Course · 1 - 4 Weeks

University of Colorado Boulder
Skills you'll gain: Data Ethics, Security Awareness, Ethical Standards And Conduct, Cybersecurity, Responsible AI, digital literacy, Information Privacy, Social Impact, AI Personalization, Media and Communications, Data Security, Personally Identifiable Information, Law, Regulation, and Compliance, Penetration Testing
★ 4.5 (27) · Beginner · Course · 1 - 4 Weeks

Johns Hopkins University
Skills you'll gain: Data Import/Export, Web Scraping, Tidyverse (R Package), Data Wrangling, Data Integration, Data Manipulation, JSON, Data Transformation, Relational Databases, R (Software), Google Sheets, Unstructured Data, R Programming, Extensible Markup Language (XML), Spreadsheet Software, Databases, SQL, Data Structures, File I/O, Application Programming Interface (API)
★ 4.7 (51) · Beginner · Course · 1 - 3 Months

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

Fractal Analytics
Skills you'll gain: Generative AI, Generative Model Architectures, Object Oriented Programming (OOP), Artificial Neural Networks, Computer Programming, Programming Principles, AI literacy, Debugging, Python Programming, Critical Thinking
★ 4.2 (26) · Intermediate · Course · 1 - 4 Weeks

Howard University
Skills you'll gain: Linear Algebra, Data Visualization, Plot (Graphics), Scientific Visualization, NumPy, Mathematical Software, Algebra, Jupyter, Mathematical Modeling, Data Science, Software Development Tools, Python Programming, Software Installation, Data Manipulation, Git (Version Control System)
★ 4.4 (16) · Beginner · Course · 1 - 4 Weeks

Skills you'll gain: Email Automation, Email Marketing, Marketing Automation, Newsletters, Automation, Personalized Campaigns, Digital Marketing Tools, Editing
★ 4.6 (45) · Beginner · Guided Project · Less Than 2 Hours

Duke University
Skills you'll gain: LLM Application, Hugging Face, Large Language Modeling, Fine-tuning, Natural Language Processing, Model Deployment, Open Source Technology, Containerization, C (Programming Language), Machine Learning, Cross Platform Development
★ 4.8 (28) · Beginner · Course · 1 - 4 Weeks

University of Michigan
Skills you'll gain: Histogram, Data Visualization, Data Literacy, Data Collection, Descriptive Statistics, Statistics, Data Analysis, Statistical Visualization, Plot (Graphics), Statistical Reporting, Sampling (Statistics), Research, Data Validation
★ 4.7 (29) · Beginner · Course · 1 - 4 Weeks

University of Washington
Skills you'll gain: Work Breakdown Structure, Agile Project Management, Agile Methodology, Stakeholder Management, Project Management, Stakeholder Engagement, Project Documentation, Project Scoping, Stakeholder Communications, Team Performance Management, People Management, Project Planning, Dependency Analysis, Communication Planning
★ 4.7 (38) · Beginner · Course · 1 - 4 Weeks