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.
University of Colorado Boulder
Skills you'll gain: Numerical Analysis, Applied Mathematics, Mathematical Modeling, Differential Equations, Physics
Build toward a degree
Intermediate · Course · 1 - 4 Weeks

O.P. Jindal Global University
Skills you'll gain: Organizational Structure, Leadership and Management, Business Ethics, Business Management, Business Planning, Human Resources Management and Planning, Operations Management, People Management, Organizational Effectiveness, Organizational Strategy, Decision Making, Leadership, Business Strategies, Performance Measurement, Critical Thinking
Beginner · Course · 1 - 3 Months

University of California, Davis
Skills you'll gain: Simulations, Social Sciences, Systems Thinking, Agentic systems, Social Network Analysis, Model Evaluation, Sociology, Economics, Scientific Methods, Computer Programming
Beginner · Course · 1 - 4 Weeks

University of Colorado Boulder
Skills you'll gain: Robotics, Data Mapping, Automation, Control Systems, Artificial Intelligence, Graph Theory, Planning, Simulation and Simulation Software, Engineering, Computer Science, Image Analysis, Digital Signal Processing, Algorithms, Simulations, Computer Programming, Virtual Environment, Torque (Physics), Data Structures, Linear Algebra, Design
Build toward a degree
Beginner · Specialization · 3 - 6 Months

University of Cape Town
Skills you'll gain: Climate Change Adaptation, Water Resources, Water Sustainability, Sustainable Development, Environmental Policy, Water Resource Management, Environmental Science, Environment, Natural Resource Management, Socioeconomics, Vulnerability, Governance
Beginner · Course · 1 - 3 Months

University of Michigan
Skills you'll gain: Demography, Environmental Regulations, Environmental Policy, Environment Health And Safety, Pollution Prevention, Environment, Public Health, Environmental Science, Occupational Health, Hazardous Waste Operations And Emergency Response Standard (HAZWOPER), Radiation Protection, Water Quality, Community Health
Beginner · Course · 1 - 4 Weeks

Nanyang Technological University, Singapore
Skills you'll gain: Systems Thinking, Case Studies, Network Analysis, Mathematical Modeling, Simulations, Systems Engineering, Social Sciences, Applied Mathematics, Sustainable Systems, Policy Analysis, Forecasting, Critical Thinking, Jupyter
Beginner · Course · 1 - 3 Months

Emory University
Skills you'll gain: Music Theory, Music History, Music, World Music, Instrumental Music, Performing Arts, Music Performance
Beginner · Course · 1 - 4 Weeks

Skills you'll gain: GitHub, HTML and CSS, Mockups, Version Control, React.js, Front-End Web Development, Web Design, Figma (Design Software), Web Development, Application Deployment, Web Analytics and SEO, Software Development, Databases
Advanced · Course · 1 - 3 Months

University of Michigan
Skills you'll gain: Health Informatics, Executive Presence, Strategic Communication, Healthcare Ethics, Strategic Planning, Health Care Administration, Health Policy, Leadership, Business Planning, Patient Safety, Innovation, Healthcare Project Management, Telehealth, Design Thinking, Advocacy, Communication, Leadership and Management, Change Management, Continuous Quality Improvement (CQI), Safety Standards
Beginner · Specialization · 1 - 3 Months

Board Infinity
Skills you'll gain: Selling Techniques, Business, Marketing, Economics, Advertising, Market Dynamics, Case Studies, Business Solutions, Market Analysis, Product Strategy, Business Planning, Complex Problem Solving
Beginner · Specialization · 1 - 3 Months

Skills you'll gain: Data Ethics, Responsible AI, Data Collection, Game Theory, Data Preprocessing, Machine Learning, Algorithms, Artificial Intelligence, Model Evaluation, Social Justice, Predictive Modeling
Beginner · Course · 1 - 4 Weeks