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: 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

L&T EduTech
Skills you'll gain: Engineering Drawings, Mechanical Drawings, Structural Analysis, Design Specifications, Mechanical Design, Technical Drawing, Engineering Analysis, Process Flow Diagrams, Manufacturing Standards, Thermal Management, Technical Standard, Engineering Calculations, Vibrations, Simulation and Simulation Software, Materials science
★ 4.4 (46) · Intermediate · Course · 1 - 4 Weeks

Universidad de Palermo
Skills you'll gain: Storytelling, Data Storytelling, Brand Strategy, Brand Marketing, Visual Storytelling, Branding, Corporate Communications, Strategic Communication, Content Creation, Marketing Communications, Driving engagement, Content Strategy, Business Strategy
★ 4.1 (27) · Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: OpenAI API, Fine-tuning, OpenAI, Large Language Modeling, Generative AI, ChatGPT, Prompt Engineering, Generative Model Architectures, LLM Application, Token Optimization, File Management, Embeddings, Classification Algorithms, Application Development, Model Training, Python Programming
★ 3.7 (23) · Beginner · Course · 1 - 4 Weeks

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

LearnKartS
Skills you'll gain: Java Programming, Object Oriented Programming (OOP), Object Oriented Design, Java, Code Reusability, Maintainability, Programming Principles, Computer Programming, Application Development, Android Development, Memory Management
★ 4.4 (35) · Beginner · Course · 1 - 4 Weeks
Georgia Institute of Technology
Skills you'll gain: Software-Defined Networking, Virtual Networking, Virtualization, Virtual Machines, Cloud Infrastructure, Network Architecture, Network Infrastructure, Cloud Computing, Cloud Deployment, Network Performance Management, Linux, Network Security, Firewall, Performance Tuning, Network Routing, Scalability
★ 4.8 (35) · Mixed · Course · 1 - 3 Months

The Chinese University of Hong Kong
Skills you'll gain: Culture, Ancient History, Cultural Diversity, World History, Liberal Arts, Social Studies, Aesthetics, Anthropology, Oral Expression, Governance
★ 4.8 (39) · Intermediate · Course · 1 - 3 Months
Imperial College London
Skills you'll gain: Virtual Reality, Augmented and Virtual Reality (AR/VR), Android (Operating System), Virtual Environment, 3D Assets, Visualization (Computer Graphics), Android Development, Computer Graphics, Android Studio, Computer Graphic Techniques, Application Development, Animations
★ 4.6 (16) · Advanced · Course · 1 - 4 Weeks

National Taiwan University
Skills you'll gain: Civil Law, Court Systems, Legal Proceedings, Litigation and Civil Justice, Case Law, Law, Regulation, and Compliance, Governance, Social Justice, Social Sciences, Gerontology, Political Sciences, Regulation and Legal Compliance, Economic Development
★ 4.6 (32) · Beginner · Course · 1 - 3 Months

Skills you'll gain: Data Preprocessing, Unsupervised Learning, Model Evaluation, Time Series Analysis and Forecasting, Supervised Learning, Machine Learning, Artificial Intelligence and Machine Learning (AI/ML), Machine Learning Algorithms, Model Training, Feature Engineering, Artificial Intelligence, Deep Learning, Classification Algorithms, Generative AI, Model Optimization, Regression Analysis
★ 4.6 (28) · Intermediate · Course · 1 - 4 Weeks

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