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.

Scrimba
Skills you'll gain: Responsive Web Design, User Interface (UI) Design, User Interface (UI), Web Design, HTML and CSS, Web Design and Development, Graphic and Visual Design, Design Elements And Principles, Maintainability, Layout Design, Cascading Style Sheets (CSS), Usability, User Experience Design, Hypertext Markup Language (HTML), Color Theory, Animations
★ 4.5 (11) · Intermediate · Course · 1 - 3 Months

University of California, Santa Cruz
Skills you'll gain: File I/O, Debugging, Go (Programming Language), Programming Principles, C (Programming Language), Program Development, Data Structures, Computer Programming, C and C++, Algorithms
★ 3.9 (10) · Beginner · Course · 1 - 3 Months

Packt
Skills you'll gain: Data Analysis Expressions (DAX), Customer Insights, Power BI, Data Modeling, Customer Analysis, Dashboard, Data Transformation, Dashboard Creation, Data Wrangling, Data Import/Export, Data Manipulation, Database Design, Business Intelligence, Interactive Data Visualization, Data Integration, Star Schema, Time Series Analysis and Forecasting, Data Cleansing, Relational Databases, Data Visualization Software
★ 4.8 (14) · Beginner · Specialization · 1 - 4 Weeks

Yale University
Skills you'll gain: Environment and Resource Management, Environmental Issue, Sustainable Development, Water Resources, Diversity Awareness, Intercultural Competence, Climate Change Adaptation, Ethical Standards And Conduct, Cultural Diversity, Liberal Arts, Social Justice, Advocacy
★ 4.9 (18) · Beginner · Course · 1 - 3 Months

Infosec
Skills you'll gain: Prompt Engineering, ChatGPT, Security Testing, AI Security, Responsible AI, API Testing, AI Integrations, Penetration Testing, OpenAI, Exploitation techniques, Vulnerability Scanning, Generative AI
★ 4.1 (22) · Beginner · Course · 1 - 3 Months

Skills you'll gain: Root Cause Analysis, Correlation Analysis, Regression Analysis, Statistical Methods, Statistics, Data Collection, Descriptive Statistics, Statistical Hypothesis Testing, Data Literacy, Probability & Statistics, Statistical Analysis, Process Analysis, Six Sigma Methodology, Lean Six Sigma, Quantitative Research, Business Process Improvement, Data Analysis, Process Improvement, Statistical Inference, Operational Efficiency
★ 4.2 (19) · Beginner · Course · 1 - 4 Weeks

Skills you'll gain: Data Import/Export, Data Visualization Software, Cloud Deployment, Data Visualization, Restful API, Data Mapping, Data Presentation, Interactive Data Visualization, Extract, Transform, Load, Dashboard Creation, Histogram, Data Store, Data Transformation, Amazon Web Services, Cloud Hosting, Scalability, Cloud Management, System Monitoring, NoSQL, Query Languages
★ 4.4 (16) · Beginner · Specialization · 1 - 3 Months

University of Colorado Boulder
Skills you'll gain: Recurrent Neural Networks (RNNs), Generative AI, Fine-tuning, Vision Transformer (ViT), Machine Learning Methods, Model Optimization, Model Training, Large Language Modeling, Embeddings, Network Architecture
★ 4.5 (15) · Intermediate · Course · 1 - 3 Months

Coursera
Skills you'll gain: Legal Strategy, Legal Technology, Legal Research, Generative AI, AI Workflows, Data Ethics, AI literacy, Decision Intelligence, Responsible AI, AI Integrations, Legal Writing, Artificial Intelligence, Automation, Predictive Modeling, Ethical Standards And Conduct
★ 3.9 (14) · Beginner · Course · 1 - 4 Weeks

Skills you'll gain: International Financial Reporting Standards, Financial Reporting, Financial Accounting, Technical Accounting, Financial Statement Analysis, Business Reporting, Financial Statements, Contract Accounting, Consolidation, Mergers & Acquisitions, Insurance Policies, Business Valuation, Insurance, Accounting, Fixed Asset, Asset Management, Risk Management
★ 4.9 (18) · Beginner · Course · 1 - 3 Months

Skills you'll gain: MySQL Workbench, MySQL, Database Management Systems, Database Software, Database Management, Data Manipulation, Data Management, SQL, Databases, Information Management, Query Languages, Data Integration, Data Science
★ 4.6 (21) · Beginner · Guided Project · Less Than 2 Hours

LearnQuest
Skills you'll gain: Test Driven Development (TDD), Unit Testing, Development Testing, Software Testing, Java, Test Case, Maintainability, Software Design
★ 3.6 (17) · Intermediate · Course · 1 - 4 Weeks