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.

Lund University
Skills you'll gain: Climate Change Adaptation, Sustainable Development, Sustainable Design, Governance, Water Sustainability, Sustainable Technologies, Environment, Systems Thinking, Environmental Science, Climate Change Mitigation, Case Studies, Water Resources, Business Modeling, Stakeholder Engagement
Beginner · Course · 1 - 3 Months

The University of North Carolina at Chapel Hill
Skills you'll gain: Music Theory, Choral Music, Music Performance, Instrumental Music, Music, Classical Music, Coordination, Oral Expression
Mixed · Course · 1 - 3 Months

University of Michigan
Skills you'll gain: Editing, Writing, Planning, Brainstorming, Time Management, Overcoming Obstacles, Productivity, Creativity, Growth Mindedness, Learning Strategies
Beginner · Course · 1 - 4 Weeks

Columbia University
Skills you'll gain: Image Quality, Image Analysis, Computer Vision, Photography, Color Theory, Computer Displays, Computer Graphics, Digital Signal Processing, Semiconductors
Beginner · Course · 1 - 3 Months

Universidad Nacional Autónoma de México
Skills you'll gain: Ethical Standards And Conduct, Business Ethics, Social Network Analysis, Public Administration, Accountability, Policy Analysis, Law, Regulation, and Compliance, Analysis, Social Sciences, Systems Thinking, Case Studies, Regulation and Legal Compliance, Governance, Social Justice, Disciplinary Procedures, Legal Proceedings, Compliance Training, Political Sciences, Performance Measurement
Beginner · Course · 1 - 3 Months

Peking University
Skills you'll gain: Data Structures, Computational Thinking, Graph Theory, Theoretical Computer Science, Programming Principles, Algorithms, Computer Programming, Data Storage, C (Programming Language), C++ (Programming Language)
Mixed · Course · 1 - 3 Months

Skills you'll gain: Canva (Software), Multimedia, Developing Training Materials, Visual Design, Graphical Tools, Graphic Design
Beginner · Guided Project · Less Than 2 Hours

National Academy of Sports Medicine
Skills you'll gain: Nutrition Counseling, Nutrition and Diet, Nutritional Assessment, Nutrition Care Plans, Nutrition Education, Sports Medicine, Exercise Science, Coaching, Public Health and Disease Prevention
Beginner · Course · 1 - 4 Weeks

Yeshiva University
Skills you'll gain: Ancient History, Art History, World History, Research, Color Theory, Timelines, Cultural Diversity, Storytelling
Mixed · Course · 1 - 3 Months
Google Cloud
Skills you'll gain: Presentations, Google Workspace, Productivity Software, Sales Presentations, Business Communication, Version Control, Collaborative Software, Multimedia, Data Sharing
Beginner · Course · 1 - 3 Months

Illinois Tech
Skills you'll gain: Database Systems, Relational Databases, Database Management, Database Theory, Databases, SQL, Database Design, Database Management Systems, Database Architecture and Administration, Data Access, Query Languages, Data Modeling, Data Manipulation, User Accounts
Build toward a degree
Beginner · Course · 1 - 4 Weeks

University of Illinois Urbana-Champaign
Skills you'll gain: Big Data, Apache Spark, Apache Hadoop, Apache Mahout, Distributed Computing, Data Storage, Data Processing, NoSQL, Apache Kafka, Cloud Computing, Real Time Data, Databases, Analytics, Deep Learning, Scalability, Machine Learning Algorithms, Graph Theory, Machine Learning
Mixed · Course · 1 - 3 Months