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.

O.P. Jindal Global University
Skills you'll gain: Research, Psychology, Mental Health Diseases and Disorders, Scientific Methods, Human Learning, Human Development, Learning Theory, Culture, Biology, Ethical Standards And Conduct, Case Studies, Statistical Analysis
Build toward a degree
Beginner · Course · 1 - 3 Months

University at Buffalo
Skills you'll gain: Governance, Meeting Facilitation, Leadership and Management, Organizational Effectiveness, Leadership, Case Studies, Organizational Structure, Culture Transformation, People Development, Discussion Facilitation, Performance Improvement, Succession Planning, Business Ethics, Culture, Diversity and Inclusion, Recruitment Strategies
Mixed · Course · 1 - 3 Months

Kennesaw State University
Skills you'll gain: Crisis Management, Organizational Leadership, Leadership Development, Leadership, Strategic Leadership, Team Leadership, Business Leadership, Leadership and Management, Dealing With Ambiguity, Professional Development, Strategic Decision-Making, Organizational Change, People Development, Innovation, Decision Making, Emotional Intelligence, Learning Styles, Relationship Building, Adaptability
Beginner · Course · 1 - 4 Weeks

Skills you'll gain: HVAC, Building Services Engineering, Thermal Management, Mechanical Engineering, Engineering Calculations, Energy and Utilities, Estimation, Environmental Issue
Intermediate · Course · 1 - 4 Weeks

Universiteit Leiden
Skills you'll gain: Sustainable Development, Sustainable Systems, Environment, Pollution Prevention, Climate Change Mitigation, Environmental Policy, Environmental Science, Systems Thinking, Climate Change Adaptation, Biology, Community Organizing
Beginner · Course · 1 - 4 Weeks

The Hong Kong University of Science and Technology
Skills you'll gain: Web Analytics and SEO, AI Personalization, Semantic Web, Algorithms, Query Languages, Network Analysis, Text Mining, Information Architecture, Performance Testing, Natural Language Processing, User Research, Data Structures, Graph Theory, UI/UX Research, Applied Machine Learning, Linear Algebra
Intermediate · Course · 3 - 6 Months

Kennesaw State University
Skills you'll gain: Process Improvement, Six Sigma Methodology, Lean Six Sigma, Knowledge Transfer, Continuous Improvement Process, Lean Manufacturing, Quality Management, Product Design, Statistical Methods, Design and Product, Probability & Statistics
Mixed · Course · 1 - 3 Months

Skills you'll gain: File Management, Microsoft Office, Version Control, Document Management, Data Sharing, Cloud Storage, Data Storage, Data Loss Prevention
Beginner · Guided Project · Less Than 2 Hours

Scrimba
Skills you'll gain: Responsive Web Design, User Interface (UI) Design, Web Design, Maintainability, Typography, Cascading Style Sheets (CSS), Usability, User Experience Design, Hypertext Markup Language (HTML), Color Theory, Animations, Creativity
Intermediate · Course · 1 - 3 Months

Johns Hopkins University
Skills you'll gain: Creativity, Creative Thinking, Organizational Leadership, Leadership, Innovation, Team Leadership, Business Leadership, Leadership and Management, Collaboration, Cultural Diversity
Beginner · Course · 1 - 4 Weeks

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

University of Leeds
Skills you'll gain: Resource Allocation, Operations Research, Production Planning, Graph Theory, Data-Driven Decision-Making, Decision Making, Mathematical Modeling, Process Optimization, Network Planning And Design, Complex Problem Solving, Computational Logic, Algorithms, Linear Algebra, Cryptography
Beginner · Course · 1 - 4 Weeks