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: Metasploit, Penetration Testing, Vulnerability Scanning, Exploitation techniques, Vulnerability Assessments, Cybersecurity, Data Ethics, Virtual Machines, Linux, Technical Documentation
Beginner · Guided Project · Less Than 2 Hours

Parsons School of Design, The New School
Skills you'll gain: Sustainable Architecture, Sustainable Design, Chemistry, Construction, Building Design, Materials Management, Procurement, Environment Health And Safety, Sustainable Development, Health Disparities, Public Health, Sustainability Standards, Environmental Engineering, Architectural Design, Systems Thinking, Chemical Engineering, Waste Minimization, Health Assessment, Hazard Analysis, Architectural Engineering
Intermediate · Specialization · 1 - 3 Months

Yale University
Skills you'll gain: Aesthetics, Art History, Music History, Liberal Arts, Music, Social Sciences, Social Justice, Performing Arts, Pedagogy, Teaching, Public Affairs, Cultural Diversity, Community Development, Advocacy, Case Studies
Mixed · Course · 1 - 3 Months

Board Infinity
Skills you'll gain: Selling Techniques, Business, Marketing, Economics, Advertising, Market Dynamics, Case Studies, Business Solutions, Market Analysis, Product Strategy, Business Planning, Complex Problem Solving
Beginner · Specialization · 1 - 3 Months

Skillshare
Skills you'll gain: UI/UX Strategy, User Experience, Persona (User Experience), User Flows, Interactive Design, Design Strategies
Beginner · Specialization · 3 - 6 Months

Skills you'll gain: Git (Version Control System), Version Control, GitHub, Software Versioning, Bitbucket, GitLab, Collaborative Software, Software Development, Software Engineering, Project Management
Beginner · Guided Project · Less Than 2 Hours

Universitat Autònoma de Barcelona
Skills you'll gain: Constructive Feedback, Coaching, Employee Coaching, Proactivity, Leadership, Team Management, Leadership and Management, Expectation Management, Communication, Conflict Management, Active Listening, Adaptability, Diversity and Inclusion, Emotional Intelligence, Change Management, Goal Setting
Beginner · Course · 1 - 3 Months

Skills you'll gain: Classification And Regression Tree (CART), Decision Tree Learning, Data Transformation, Supervised Learning, Predictive Modeling, Scikit Learn (Machine Learning Library), Data Processing, Pandas (Python Package), Machine Learning Algorithms
Intermediate · Guided Project · Less Than 2 Hours

University of Michigan
Skills you'll gain: Epidemiology, Pharmacology, Advocacy
Beginner · Course · 1 - 3 Months

Fred Hutchinson Cancer Center
Skills you'll gain: Collaborative Software, GitHub, Technical Writing, Version Control, Engineering Documentation, Document Management, Technical Documentation, Typography
Beginner · Course · 1 - 4 Weeks

University of Colorado Boulder
Skills you'll gain: Statistical Hypothesis Testing, Research Design, Statistical Analysis, Data Ethics, Statistical Modeling, Data Science, Data Analysis, Quantitative Research, Regression Analysis, Probability & Statistics, Linear Algebra, Calculus
Build toward a degree
Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: SQL, Query Languages, Relational Databases, Database Management, Databases, Data Analysis
Intermediate · Guided Project · Less Than 2 Hours