Number theory courses can help you learn prime numbers, divisibility rules, modular arithmetic, and integer properties. You can build skills in problem-solving, logical reasoning, and algorithmic thinking, that support tackling complex mathematical challenges. Many courses introduce tools like Python for implementing algorithms and mathematical software for exploring number patterns, enabling you to apply your knowledge in practical situations such as cryptography and coding theory.

École normale supérieure
Skills you'll gain: Data Visualization Software, Geospatial Mapping, Graphic and Visual Design, Geographic Information Systems, Data Mapping, World History, Quantitative Research, Data Presentation, Color Theory
Beginner · Course · 1 - 3 Months

L&T EduTech
Skills you'll gain: Oil and Gas, Petroleum Industry, Hazard Analysis, Safety Standards, Environmental Resource Management, Energy and Utilities, Environmental Regulations, Environment Health And Safety, Big Data, Plant Operations and Management, Waste Minimization, Process Engineering, Chemical Engineering, Risk Analysis, Environmental Engineering, Failure Mode And Effects Analysis, Data Management, Pump Stations, Data Processing, Process Control
Advanced · Specialization · 3 - 6 Months

Lund University
Skills you'll gain: Climate Change Adaptation, Sustainable Development, Sustainable Design, Governance, Water Sustainability, Systems Thinking, Environmental Resource Management, Environmental Science, Climate Change Mitigation, Case Studies, Water Resources, Business Modeling, Stakeholder Engagement, Project Finance
Beginner · Course · 1 - 3 Months

Imperial College London
Skills you'll gain: Continuous Quality Improvement (CQI), Run Chart, Qualitative Research, Pareto Chart, Public Health, Patient Safety, Health Policy, Public Health and Disease Prevention, Health Equity, Health Systems, Community Health, Social Determinants Of Health, Clinical Leadership, Patient-centered Care, Care Management, Data Quality, Scientific Methods, Health Care, Health Informatics, Health Disparities
Beginner · Specialization · 1 - 3 Months

Skillshare
Skills you'll gain: Video Editing, Animations, Timelines, Post-Production, Storytelling, Motion Graphics, Color Theory, Video Production, System Configuration, Editing, Photo/Video Production and Technology, Data Import/Export, Configuration Management, Image Quality, Web Content Accessibility Guidelines, Music, Color Matching, File Management, Typography
Beginner · Specialization · 3 - 6 Months

University of Colorado Boulder
Skills you'll gain: Systems Engineering, Failure Analysis, Model Based Systems Engineering, Engineering Management, Requirements Management, Scope Management, Design Reviews, Project Scoping, Root Cause Analysis, Test Engineering, Program Management, Systems Thinking, User Requirements Documents, Cost Management, Contract Management, Systems Design, Product Lifecycle Management, Business Requirements, Risk Management, Requirements Analysis
Build toward a degree
Beginner · Specialization · 3 - 6 Months

University of Colorado Boulder
Skills you'll gain: Statistical Inference, Statistical Modeling, Statistical Hypothesis Testing, Regression Analysis, R Programming, Data Ethics, Research Design, Statistical Methods, Data Analysis, Statistical Analysis, Data Modeling, Predictive Modeling, Mathematical Modeling, Probability & Statistics, Data Science, Quantitative Research, Machine Learning, Classification And Regression Tree (CART), Linear Algebra, Probability Distribution
Build toward a degree
Intermediate · Specialization · 3 - 6 Months

Sapienza University of Rome
Skills you'll gain: Ancient History, 3D Modeling, Public History, Scientific Methods, Data Sharing, Anthropology, Investigation, Cultural Diversity, Case Studies, Art History, Research, Data Management, Data Collection
Mixed · Course · 1 - 3 Months

Rice University
Skills you'll gain: Diversity Equity and Inclusion Initiatives, Diversity and Inclusion, Diversity Programs, Intercultural Competence, Diversity Training, Human Resource Strategy, Strategic Planning, Diversity Awareness, Employee Retention, Demography, Workplace inclusivity, Benchmarking, Social Justice, Cultural Diversity, Human Resources, Recruitment Strategies, Peer Review, Organizational Development, Workforce Development, Leadership and Management
Intermediate · Specialization · 3 - 6 Months
Johns Hopkins University
Skills you'll gain: Systems Thinking, Health Systems, Health Policy, Public Health, Policy Analysis, Policy Development, Simulations, Systems Analysis
Mixed · Course · 1 - 4 Weeks

Skills you'll gain: Canva (Software), Logo Design, Branding, Brand Strategy, Graphic Design, Target Audience, Social Media Content, Marketing Materials, Social Media, Scheduling, Presentations, Content Creation, Social Media Marketing
Beginner · Guided Project · Less Than 2 Hours

Stanford University
Skills you'll gain: Patient Communication, Primary Care, Patient Education And Counseling, Patient-centered Care, Care Coordination, Oncology, Health Assessment, Chronic Diseases, Preventative Care, Clinical Assessment, Mental Health
Intermediate · Course · 1 - 4 Weeks