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 Pennsylvania State University
Skills you'll gain: Nutrition and Diet, Sustainability Standards, Manufacturing and Production, Market Dynamics, Water Resource Management, Business Economics, Biotechnology, Production Management, Environmental Management Systems, Climate Change Mitigation
Mixed · Course · 1 - 3 Months

Skills you'll gain: React Native, Mobile Development, React Redux, React.js, Ajax, User Interface and User Experience (UI/UX) Design, Javascript, JavaScript Frameworks, Front-End Web Development, Data Structures, Application Development, Apple iOS, Debugging, iOS Development, User Story, Android Development, UI Components, Cross Platform Development, JSON, Flutter (Software)
Beginner · Specialization · 3 - 6 Months
University of Minnesota
Skills you'll gain: User Interface (UI) Design, Usability, Human Computer Interaction, User Experience Design, Design, Design Thinking, UI/UX Research, Design Strategies, Design Research, User Research
Beginner · Course · 1 - 4 Weeks
Coursera
Skills you'll gain: AI Security, Vulnerability Scanning, Hardening, DevSecOps, Vulnerability Assessments, Responsible AI, Identity and Access Management, MLOps (Machine Learning Operations), Infrastructure Security, Security Controls, Threat Modeling, Model Deployment, Model Evaluation, CI/CD, Continuous Monitoring, AI Personalization, Resilience, Compliance Management, Containerization, Engineering
Intermediate · Course · 1 - 4 Weeks

University of Michigan
Skills you'll gain: Non-Verbal Communication, Mentorship, Emotional Intelligence, Personal Development, Self-Awareness, Interpersonal Communications, Social Skills, Coaching, Empathy, Leadership Development, Resilience, Team Building, Leadership
Intermediate · Course · 1 - 4 Weeks

University of Pennsylvania
Skills you'll gain: Calculus, Engineering Calculations, Mathematical Theory & Analysis, Algebra, Advanced Mathematics, Applied Mathematics, Derivatives
Mixed · Course · 1 - 4 Weeks

LearnQuest
Skills you'll gain: Package and Software Management, Linux Administration, Linux, Linux Commands, Virtual Private Networks (VPN), System Monitoring, Operating System Administration, Public Key Infrastructure, Ubuntu, Version Control, File Management, Command-Line Interface, Linux Servers, Intrusion Detection and Prevention, Git (Version Control System), File Systems, User Accounts, Firewall, Cloud Computing Architecture, DevOps
Beginner · Specialization · 3 - 6 Months

University of California, Davis
Skills you'll gain: Employee Coaching, Coaching, Management Training And Development, Team Performance Management, Organizational Change, Expectation Management, Performance Management, Key Performance Indicators (KPIs), Accountability, Employee Performance Management, Professional Development, Leadership and Management, Team Management, People Development, Performance Analysis, Performance Measurement, Adaptability, Constructive Feedback, Leadership, Communication
Intermediate · Specialization · 3 - 6 Months

University of Pennsylvania
Skills you'll gain: R Programming, R (Software), Statistical Analysis, Statistical Methods, Statistical Modeling, Statistical Inference, Data Analysis, Quantitative Research, Regression Analysis, Research Design, Graph Theory
Intermediate · Course · 1 - 3 Months

University of California San Diego
Skills you'll gain: Bioinformatics, Algorithms, Data Structures, Text Mining, Theoretical Computer Science, Computational Thinking
Intermediate · Course · 1 - 4 Weeks

Dartmouth College
Skills you'll gain: Supervised Learning, Predictive Modeling, Logistic Regression, Statistical Modeling, Model Evaluation, Machine Learning, Machine Learning Algorithms, Classification Algorithms, Regression Analysis, Probability & Statistics, Linear Algebra
Build toward a degree
Intermediate · Course · 1 - 3 Months
Michigan State University
Skills you'll gain: Infographics, Adobe Illustrator, Graphic and Visual Design, Data Mapping, Graphic Design, Typography, Layout Design, Design Elements And Principles, Storytelling, Color Theory
Mixed · Course · 1 - 4 Weeks