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.

Nanjing University
Skills you'll gain: World History, Ancient History, Immigration Law, Demography, Socioeconomics, International Relations, Cultural Diversity
Mixed · Course · 1 - 3 Months

Yale University
Skills you'll gain: Environmental Science, Environment, Anthropology, Sustainable Development, Teaching, Liberal Arts, Storytelling, Community Development, Biology, Systems Thinking, Cultural Diversity, Physics
Mixed · Course · 1 - 3 Months

Microsoft
Skills you'll gain: Responsive Web Design, Git (Version Control System), Web Development, Cascading Style Sheets (CSS), Data Persistence, React.js, Version Control, Performance Tuning, Full-Stack Web Development, GitHub, Event-Driven Programming, HTML and CSS, Application Design, Game Design, Webpack, Software Testing, Unit Testing, Software Development, Development Environment, Javascript
Beginner · Professional Certificate · 3 - 6 Months

The University of Notre Dame
Skills you'll gain: Negotiation, Leadership Development, Change Management, Leadership, Strategic Leadership, Organizational Leadership, Business Ethics, Business Leadership, Critical Thinking and Problem Solving, Leadership and Management, Emotional Intelligence, Ethical Standards And Conduct, Industrial and Organizational Psychology, Self-Awareness
Beginner · Course · 1 - 4 Weeks

Johns Hopkins University
Skills you'll gain: Persuasive Communication, Leadership, Influencing, Strategic Leadership, Organizational Leadership, Leadership Development, Business Leadership, Leadership and Management, Team Leadership, Communication, Agile Project Management, Decision Making
Beginner · Course · 1 - 4 Weeks

Skills you'll gain: Version Control, Test Script Development, Continuous Integration, Test Tools, Testability, Automation, Scripting, Maintainability, Hypertext Markup Language (HTML), Development Environment, Integrated Development Environments, Debugging, Software Design Patterns
Beginner · Specialization · 3 - 6 Months
Curtis Institute of Music
Skills you'll gain: Music Performance, Instrumental Music, Music History, Classical Music, Performing Arts, Music, Music Theory
Intermediate · Course · 1 - 3 Months

ESADE Business and Law School
Skills you'll gain: Succession Planning, Business Modeling, Business Management, Systems Thinking, Governance, Relationship Management, Business Systems, Technology Strategies, Organizational Structure, Business, Organizational Development, Family Support, Risk Analysis, Business Valuation, Business Leadership, Communication, Leadership, Innovation, Business Transformation, Entrepreneurship
Beginner · Specialization · 3 - 6 Months

Banco Interamericano de Desarrollo
Skills you'll gain: Communication, Public Speaking, Emotional Intelligence, Empowerment, Resilience, Personal Development, Professional Networking, Mentorship, Professional Development, Self-Awareness, Coaching, Leadership, Leadership and Management, Empathy, Diversity Equity and Inclusion Initiatives
Beginner · Course · 1 - 4 Weeks

Skills you'll gain: Canva (Software), Product Promotion, Marketing Materials, Promotional Strategies, Product Knowledge, Design, Presentations, Dashboard, Graphic and Visual Design, Commercialization, Creative Design, Graphic Design, Sales
Beginner · Guided Project · Less Than 2 Hours

University of Illinois Urbana-Champaign
Skills you'll gain: Loss Prevention, Waste Minimization, Food Quality Assurance And Control, Supply Chain, Food and Beverage, Supply Chain Management, Market Dynamics, Economics, Capacity Planning, Stakeholder Management, Systems Thinking, Analysis, Education and Training
Beginner · Course · 1 - 3 Months

University of Michigan
Skills you'll gain: Manufacturing Processes, Augmented Reality, 3D Modeling, Materials science, Mechanical Design, Industrial Design, Industrial Engineering, Production Process
Beginner · Course · 1 - 3 Months