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.

Board Infinity
Skills you'll gain: Systems Development Life Cycle, Software Quality Assurance, Software Development Life Cycle, Quality Assurance, Software Quality (SQA/SQC), Software Documentation, Functional Testing, Software Testing, Software Development Methodologies, Acceptance Testing, User Acceptance Testing (UAT), Test Case, Maintainability, Test Planning, Unit Testing, Software Design, Technical Documentation, Agile Methodology
★ 4 (34) · Beginner · Course · 1 - 4 Weeks

American Psychological Association
Skills you'll gain: Mental Health Diseases and Disorders, Trauma Care, Mental Health, Mental Health Therapies, Psychology, Psychotherapy, Cultural Responsiveness, Mental and Behavioral Health, Cultural Sensitivity, Patient Evaluation, Stress Management
★ 4.8 (28) · Beginner · Course · 1 - 3 Months

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

Duke University
Skills you'll gain: Telehealth, Teamwork, Patient Communication, Collaboration, Clinical Assessment, Vital Signs, Health Technology, Patient Preparation, Patient Coordination, Patient Education And Counseling, Health Assessment, Patient-centered Care, Patient Treatment, Primary Care, Health Care, Health Systems, Telecommunications, Patient Evaluation, Care Management, Communication
★ 4.9 (48) · Beginner · Specialization · 1 - 4 Weeks

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

Dartmouth College
Skills you'll gain: Structural Analysis, Structural Engineering, Civil Engineering, Engineering Calculations, Engineering Analysis, Construction, Materials science, Mechanics, Engineering Design Process, Design
★ 4.8 (40) · Beginner · Course · 1 - 4 Weeks

Skills you'll gain: Music Performance, Musical Composition, Performing Arts, Music Theory, Music, Instrumental Music, Creativity
★ 4.1 (31) · 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

Banco Interamericano de Desarrollo
Skills you'll gain: Climate Change Adaptation, Climate Change Mitigation, Water Sustainability, Climate Change Programs, Water Resource Management, Energy and Utilities, Water Resources, Environmental Policy, Sustainable Business, Risk Management, Environmental Monitoring, Risk Analysis
★ 4.9 (56) · Beginner · Course · 1 - 4 Weeks

Korea Advanced Institute of Science and Technology(KAIST)
Skills you'll gain: Mechanics, Mechanical Engineering, Engineering Analysis, Torque (Physics), Physics, Engineering Calculations, Differential Equations, Integral Calculus, Calculus, Applied Mathematics
★ 4.7 (38) · Intermediate · Course · 3 - 6 Months

The Chinese University of Hong Kong
Skills you'll gain: Culture, Ancient History, Cultural Diversity, World History, Art History, Liberal Arts, Social Studies, Aesthetics, Anthropology, Oral Expression, Community Development, Storytelling, Economics, Policy, and Social Studies, Governance
★ 4.8 (39) · Intermediate · Course · 1 - 3 Months

LearnKartS
Skills you'll gain: Jenkins, CI/CD, Devops Tools, DevOps, Continuous Integration, Continuous Delivery, Continuous Deployment, Docker (Software), Containerization, Build Tools, Software Development, Application Deployment, Test Automation, Software Installation
★ 3.5 (35) · Beginner · Course · 1 - 4 Weeks