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 System
Skills you'll gain: Performance Management, Mentorship, Budget Management, Team Management, Project Accounting, People Management, Leadership and Management, Recruitment, Leadership, Professional Development, Resource Management, Coaching, Compliance Management, Goal Setting, Clinical Research
Intermediate · Course · 1 - 3 Months

University of Cape Town
Skills you'll gain: Climate Change Adaptation, Research, Program Evaluation, Community Development, Sustainable Development, Communication, Systems Thinking, Research Methodologies, Policy Development, Collaboration
Beginner · Course · 1 - 3 Months
University of Washington
Skills you'll gain: Big Data, Relational Databases, Database Systems, Dataflow, Databases, Data Science, Data Manipulation, Data Processing, NoSQL, Apache Spark, Distributed Computing, Apache Hadoop, SQL, Data Analysis, Query Languages, Cloud Computing, Scalability, Graph Theory, Python Programming, Algorithms
Mixed · Course · 1 - 3 Months

Johns Hopkins University
Skills you'll gain: Social Network Analysis, Network Analysis, Graph Theory, Social Sciences, Statistical Analysis, R Programming, Sociology, Statistical Modeling, Statistical Hypothesis Testing
Intermediate · Course · 1 - 4 Weeks
University of Illinois Urbana-Champaign
Skills you'll gain: Bankruptcies, Securities (Finance), Commercial Laws, Loans, Banking, Financial Regulations, Regulation and Legal Compliance, Business, Financial Regulation, Organizational Structure, Governance, Mergers & Acquisitions
Build toward a degree
Intermediate · Course · 1 - 3 Months
University of Washington
Skills you'll gain: Unsupervised Learning, Supervised Learning, Predictive Analytics, Statistical Modeling, R Programming, Statistical Methods, Decision Tree Learning, Statistical Inference, Statistical Analysis, Machine Learning Algorithms, Machine Learning, Graph Theory, Probability & Statistics, Network Analysis, Big Data, Sampling (Statistics), Random Forest Algorithm
Mixed · Course · 1 - 4 Weeks

Dartmouth College
Skills you'll gain: Environment, Environmental Issue, Environmental Science, Sustainable Development, Biology, Hydrology, Water Quality, Systems Thinking, Water Resource Management, Energy and Utilities, Physics, Climate Change Mitigation, Chemistry
Beginner · Course · 1 - 4 Weeks

Institute for the Future
Skills you'll gain: Visionary, Strategic Planning, Action Oriented, Planning, Community Organizing, Strategic Thinking, Optimism, Creative Thinking, Systems Thinking, Innovation, Persuasive Communication, Creativity, Goal Setting, Leadership, Storytelling, Cultural Responsiveness, Discussion Facilitation
Beginner · Course · 1 - 3 Months

Johns Hopkins University
Skills you'll gain: Health Promotion, Behavioral Health, Mental and Behavioral Health, Health Education, Cultural Sensitivity, Public Health, Health Policy, Community Health, Social Sciences, Program Evaluation, Learning Theory
Beginner · Course · 1 - 3 Months

Universidad Nacional Autónoma de México
Skills you'll gain: Post-Production, Music Theory, Musical Composition, Music, Media Production, Music History, Editing, Software Installation, Creativity, File Management
Intermediate · Course · 1 - 4 Weeks

University of California, Davis
Skills you'll gain: Simulations, Social Sciences, Systems Thinking, Agentic systems, Social Network Analysis, Computational Thinking, Sociology, Economics, Scientific Methods, Artificial Intelligence and Machine Learning (AI/ML), Computer Programming
Beginner · Course · 1 - 4 Weeks

University of Pennsylvania
Skills you'll gain: Human Capital, Employee Retention, Workforce Development, Employee Training, Talent Management, Digital Transformation, Organizational Strategy, Human Resources, Employee Engagement, Supply Chain Management, Human Resources Management and Planning, E-Commerce, Customer experience strategy (CX), Supply Chain, Brand Strategy, Analytics, Brand Management, Marketing Strategies, Customer Insights, Performance Management
Beginner · Specialization · 1 - 3 Months