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: Tidyverse (R Package), Data Wrangling, R (Software), Data Cleansing, Data Transformation, Data Manipulation, R Programming, Data Science, Exploratory Data Analysis, Data Analysis, Data Management, File Management, Data Visualization
★ 4.4 (54) · Beginner · Course · 1 - 3 Months

Yale University
Skills you'll gain: Environmental Issue, Environment, Biology, Environment and Resource Management, Social Justice, Culture, Natural Resource Management, International Relations, Sustainable Development, Sustainable Systems, Life Sciences, Anthropology, World History, Intercultural Competence, Liberal Arts, Ethical Standards And Conduct, Cultural Diversity, European History, Climate Change Mitigation, Advocacy
★ 4.8 (65) · Beginner · Course · 1 - 3 Months

Coursera
Skills you'll gain: R (Software), R Programming, Computational Logic, Arithmetic, Statistical Programming, Development Environment, Programming Principles, Data Import/Export
★ 4.5 (52) · Beginner · Guided Project · Less Than 2 Hours

LearnKartS
Skills you'll gain: Apache Kafka, Real Time Data, Data Pipelines, Analytics, Distributed Computing, Data Processing, Live Streaming, Systems Architecture, Event-Driven Programming, Development Environment
★ 3.9 (43) · Beginner · Course · 1 - 3 Months
Rice University
Skills you'll gain: Computer Science, Computer Programming, Computational Thinking, Programming Principles, Algorithms, Python Programming
★ 4.8 (116) · Intermediate · Course · 1 - 4 Weeks

University of Colorado Boulder
Skills you'll gain: Real-Time Operating Systems, Embedded Systems, Embedded Software, System Programming, System Design and Implementation, Software Design, OS Process Management, Linux, Systems Analysis, Test Tools, Theoretical Computer Science, Verification And Validation, Algorithms
★ 4.3 (20) · Advanced · Course · 1 - 4 Weeks

LearnQuest
Skills you'll gain: JUnit, Test Driven Development (TDD), Unit Testing, Software Testing, Test Case, Eclipse (Software), Test Data, Development Testing, Test Automation, Test Execution Engine, Integrated Development Environments, Test Script Development, Java, Test Tools, Maintainability, Software Design
★ 3.8 (73) · Intermediate · Specialization · 1 - 3 Months

Skills you'll gain: Figma (Design Software), UI Components, Typography, Prototyping, Responsive Web Design, Digital Design, User Interface and User Experience (UI/UX) Design, Interactive Design, Interaction Design, UI/UX Strategy, User Experience Design, User Experience, Motion Graphics, Graphic and Visual Design, Layout Design, User Interface (UI) Design, Animations, Collaborative Software, Web Content Accessibility Guidelines, AI Workflows
★ 4.5 (34) · Intermediate · Specialization · 3 - 6 Months

Scrimba
Skills you'll gain: Typography, Responsive Web Design, Cascading Style Sheets (CSS), HTML and CSS, UI Components, Web Design, Web Design and Development, Front-End Web Development, Animations, Mockups, User Interface (UI), User Interface (UI) Design, Web Development, Debugging
★ 4.6 (56) · Intermediate · Specialization · 1 - 3 Months

University of Colorado System
Skills you'll gain: Requirements Analysis, Security Requirements Analysis, Requirements Elicitation, Functional Requirement, Goal Setting, User Requirements Documents, Unified Modeling Language, Meeting Facilitation, Conflict Management, Discussion Facilitation, Risk Management Framework, Analysis, Negotiation, Security Awareness
★ 4.7 (66) · Beginner · Course · 1 - 4 Weeks

Skills you'll gain: Graph Theory, Model Evaluation
★ 4.4 (44) · Advanced · Course · 1 - 3 Months

University of Illinois Urbana-Champaign
Skills you'll gain: Network Infrastructure, General Networking, Network Protocols, Network Routers, Network Architecture, Networking Hardware, Internet Of Things, Network Routing, Wireless Networks, Local Area Networks, Network Switches, Virtual Local Area Network (VLAN), Enterprise Architecture, Network Security
★ 4.8 (42) · Intermediate · Course · 1 - 4 Weeks