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.

The University of Chicago
Skills you'll gain: Intellectual Property, Law, Regulation, and Compliance, Information Privacy, Media and Communications, Digital Content, Technology Strategies, Regulation and Legal Compliance, Network Protocols, Telecommunications, Market Dynamics, Case Law, Lawsuits, Economics, Competitive Analysis
Mixed · Course · 1 - 3 Months

University of California, Santa Cruz
Skills you'll gain: Literacy, Demography, Child Development, Human Learning, Language Learning, Childhood Education and Development, Natural Language Processing, Learning Theory, Education Software and Technology, Vocabulary, Research
Beginner · Course · 1 - 4 Weeks

Skills you'll gain: Database Administration, Database Management, Database Architecture and Administration, Relational Databases, Operational Databases, Database Systems, IBM DB2, MySQL, Performance Tuning, PostgreSQL, Disaster Recovery, Data Storage Technologies, Database Design, System Monitoring, Role-Based Access Control (RBAC), User Accounts, Encryption
Intermediate · Course · 1 - 3 Months
Duke University
Skills you'll gain: Pandas (Python Package), Bash (Scripting Language), Version Control, Jupyter, Linux Commands, Git (Version Control System), Shell Script, Linux, Web Scraping, Linux Administration, Data Manipulation, MySQL, Microservices, AWS SageMaker, SQL, JSON, Cloud Engineering, Python Programming, Big Data, Data Science
Beginner · Specialization · 3 - 6 Months
University of Pennsylvania
Skills you'll gain: Managed Care, Health Systems, Health Care Administration, Health Care Procedure and Regulation, Health Care, Value-Based Care, Medicaid, Insurance, Health Policy, Medicare, Economics, Behavioral Economics, Supply And Demand, Market Dynamics, Long Term Care, Payment Systems, Hospice
Mixed · Course · 1 - 4 Weeks

Berklee
Skills you'll gain: Music Performance, Post-Production, Music, Media Production, Musical Composition, Music Theory, Editing
Beginner · Course · 1 - 4 Weeks

ESSEC Business School
Skills you'll gain: Decision Making, Complex Problem Solving, Systems Thinking, Analysis, International Relations, Business Management, Economics, Policy, and Social Studies, Business Transformation, Strategic Decision-Making, Social Sciences, Risk Management, Cultural Diversity, Business, People Management, Governance, Organizational Structure, Corporate Strategy, Sociology, Organizational Strategy, Innovation
Mixed · Course · 1 - 3 Months

Skills you'll gain: Music Theory, Musical Composition, Music, Instrumental Music, Music Performance, Creativity
Intermediate · Course · 1 - 4 Weeks

University of Michigan
Skills you'll gain: Statistical Hypothesis Testing, Statistical Methods, Statistical Inference, Bayesian Statistics, Probability & Statistics, Statistical Analysis, Sampling (Statistics), Jupyter, Python Programming, Matplotlib, NumPy
Intermediate · Course · 1 - 4 Weeks

Imperial College London
Skills you'll gain: Epidemiology, Public Health, Infectious Diseases, Community Health, Economics, Policy, and Social Studies, Health Systems, Socioeconomics, Health Policy, Emergency Response, Patient Evaluation, Immunology, Diagnostic Tests, Microbiology, Media and Communications, Molecular Biology, Pathology
Beginner · Course · 1 - 3 Months
University of Pennsylvania
Skills you'll gain: Influencing, Relationship Building, Professional Networking, Persuasive Communication, Leadership, Organizational Effectiveness, Initiative and Leadership, Organizational Structure, Business Ethics, Collaboration, Stakeholder Analysis, Decision Making, Social Network Analysis, Self-Awareness
Beginner · Course · 1 - 4 Weeks

University of Michigan
Skills you'll gain: Social Work, Community and Social Work, Social Justice, Social Sciences, Human Services, Advocacy, Cultural Sensitivity, Diversity Awareness, Research, Policty Analysis, Research, and Development, Systems Thinking, Ethical Standards And Conduct
Build toward a degree
Beginner · Course · 1 - 4 Weeks