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.

Politecnico di Milano
Skills you'll gain: Public Health and Disease Prevention, Public Health, Environmental Science, Infectious Diseases, Preventative Care, Health Policy, Health Care Procedure and Regulation, Policty Analysis, Research, and Development, Climate Change Adaptation, Governance, Food Safety and Sanitation, Law, Regulation, and Compliance, Case Studies
Intermediate · Course · 1 - 3 Months

Dartmouth College
Skills you'll gain: Talent Management, People Development, Professional Networking, Collaboration, Leadership Development, Team Motivation, Teamwork, People Management, Entrepreneurship, Innovation, Leadership and Management, Leadership, Creativity, Employee Coaching, Mentorship, Influencing, Employee Retention, Recruitment Strategies, Growth Strategies
Beginner · Course · 1 - 4 Weeks

University of California San Diego
Skills you'll gain: Android Development, Application Development, Android (Operating System), Android Studio, Mobile Development, Software Development Tools, Game Design, Computer Programming Tools, Development Environment, Internet Of Things, Embedded Software, Web Servers, Web Applications, USB, Ubuntu, Peripheral Devices, Operating Systems, Software Installation, Command-Line Interface
Mixed · Course · 1 - 3 Months

University of Colorado Boulder
Skills you'll gain: Statistical Hypothesis Testing, Statistical Methods, Probability & Statistics, Data Ethics, Statistical Analysis, Quantitative Research, Statistical Inference, Statistics, Sample Size Determination, Sampling (Statistics)
Build toward a degree
Intermediate · Course · 1 - 3 Months

Skillshare
Skills you'll gain: Storyboarding, Animations, Storytelling, Motion Graphics, Multimedia, Musical Composition, Adobe After Effects, Video Production, Photo/Video Production and Technology, Computer Graphics, Video Editing, Apple software proficiency, Timelines, Writing, Color Theory, Design
Beginner · Specialization · 1 - 3 Months

Universiteit Leiden
Skills you'll gain: Statistical Inference, Statistical Hypothesis Testing, Regression Analysis, R Programming, Data Analysis, Descriptive Statistics, Statistical Methods, Probability & Statistics, Data Ethics, Data Collection, Exploratory Data Analysis, Statistical Modeling, Data Cleansing, Data Security
Beginner · Course · 1 - 3 Months

LearnKartS
Skills you'll gain: AWS Identity and Access Management (IAM), Amazon Elastic Compute Cloud, Amazon S3, Amazon Web Services, Identity and Access Management, Disaster Recovery, Amazon CloudWatch, Serverless Computing, CI/CD, Cloud Computing Architecture, Amazon DynamoDB, Solution Architecture, Containerization, Kubernetes, Hybrid Cloud Computing, Cloud Solutions, Cloud Storage, Cloud Security, Cloud Computing, API Gateway
Intermediate · Specialization · 1 - 3 Months

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

Skills you'll gain: Graphic and Visual Design, Adobe Creative Cloud, Color Theory, Graphic Design, Logo Design, Digital Design
Intermediate · Guided Project · Less Than 2 Hours

Amazon Web Services
Skills you'll gain: CI/CD, Continuous Integration, Application Deployment, Continuous Delivery, Software Development, Version Control, Git (Version Control System), DevOps, Test Automation, Unit Testing, Amazon Web Services, Software Testing
Beginner · Course · 1 - 4 Weeks

ESADE Business and Law School
Skills you'll gain: Succession Planning, Governance, Business Modeling, Systems Thinking, Organizational Structure, Business Management, Business Systems, Risk Analysis, Technology Strategies, Business Transformation, Business, Organizational Development, Family Support, Business Leadership, Business Strategy, Innovation, Business Analysis, Entrepreneurship, Communication, Case Studies
Beginner · Specialization · 3 - 6 Months

University of California, Irvine
Skills you'll gain: Presentations, Verbal Communication Skills, Communication, Non-Verbal Communication, Microsoft PowerPoint, Business Communication, English Language, Interpersonal Communications, Business Leadership, Crisis Management, Organizational Structure, Leadership and Management, Business, Business Management, Global Marketing, Rapport Building, Leadership, Corporate Communications, Grammar, Vocabulary
Mixed · Course · 1 - 4 Weeks