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.

Skills you'll gain: Computational Thinking, Algorithms, Graph Theory, Data Structures, Computer Programming, C++ (Programming Language), Object Oriented Programming (OOP)
Intermediate · Course · 1 - 4 Weeks

Universidad Nacional Autónoma de México
Skills you'll gain: Legal Research, Public Policies, Policy Analysis, Policy Development, Research Methodologies, Systems Thinking, Social Sciences, Trend Analysis, Social Justice, Qualitative Research, Ethical Standards And Conduct, Creativity
Beginner · Course · 1 - 4 Weeks

University of Washington
Skills you'll gain: Responsive Web Design, Web Design, GitHub, HTML and CSS, Cascading Style Sheets (CSS), Hypertext Markup Language (HTML), Version Control, User Experience Design, User Experience, Javascript, Web Content Accessibility Guidelines, Browser Compatibility, User Story, Web Design and Development, Front-End Web Development, Web Development, Microsoft Copilot, Mobile Development, Semantic Web, Git (Version Control System)
Beginner · Specialization · 1 - 3 Months

Fundação Instituto de Administração
Skills you'll gain: Systems Thinking, Surveys, Innovation, Simulations, Forecasting, Contingency Planning, Strategic Thinking, Process Flow Diagrams, Project Design, Systems Analysis, Corporate Strategy, Strategic Decision-Making, Business Planning, Complex Problem Solving, Business Strategy, Organizational Strategy, Analysis, Verbal Communication Skills, Business Risk Management, Risk Management
Intermediate · Specialization · 3 - 6 Months

Microsoft
Skills you'll gain: Microsoft Azure, Cloud Management, Application Deployment, Cloud Computing, Windows PowerShell, Cloud Services, Infrastructure As A Service (IaaS), Software As A Service, Virtual Machines, Platform As A Service (PaaS), Resource Management, Command-Line Interface, Verification And Validation
Intermediate · Course · 1 - 3 Months

Coursera
Skills you'll gain: Java, Data Structures, Java Programming, Data Access, Data Cleansing
Intermediate · Guided Project · Less Than 2 Hours

University of Alberta
Skills you'll gain: Natural Resource Management, Climate Change Adaptation, Environment and Resource Management, Sustainable Development, Community Development, Environmental Policy, Case Studies, International Relations, Environmental Science, Socioeconomics
Beginner · Course · 1 - 4 Weeks

The University of Chicago
Skills you'll gain: Unsupervised Learning, Machine Learning Algorithms, Deep Learning, Machine Learning, Classification And Regression Tree (CART), Decision Tree Learning, Applied Machine Learning, Scikit Learn (Machine Learning Library), Supervised Learning, Regression Analysis, Random Forest Algorithm, Dimensionality Reduction, Statistical Methods, Tensorflow, Feature Engineering, Artificial Neural Networks, Pandas (Python Package)
Intermediate · Course · 1 - 3 Months
Curtis Institute of Music
Skills you'll gain: Classical Music, Music Theory, Musical Composition, Music History, Music Performance
Intermediate · Course · 1 - 3 Months

O.P. Jindal Global University
Skills you'll gain: Economics, Financial Policy, Economic Development, International Finance, Supply And Demand, Policy Analysis, Sustainable Development, Socioeconomics, Behavioral Economics, Accounting, Market Dynamics, Critical Thinking
Build toward a degree
Beginner · Course · 1 - 3 Months

Microsoft
Skills you'll gain: Responsive Web Design, Git (Version Control System), Web Development, Cascading Style Sheets (CSS), React.js, Version Control, Web Development Tools, Full-Stack Web Development, GitHub, HTML and CSS, Application Design, Software Design Documents, Game Design, Debugging, Software Testing, Unit Testing, Software Documentation, Software Development, Development Environment, Javascript
Beginner · Professional Certificate · 3 - 6 Months

Korea Advanced Institute of Science and Technology(KAIST)
Skills you'll gain: Scala Programming, Other Programming Languages, Computer Programming, Programming Principles, Theoretical Computer Science, Extensible Languages and XML, Concept Of Operations
Mixed · Course · 1 - 3 Months