English pronunciation courses can help you learn vowel and consonant sounds, intonation patterns, and stress placement. You can build skills in clear speech, effective listening, and accent reduction techniques. Many courses introduce tools like phonetic charts and pronunciation apps, which assist in practicing sounds and tracking progress.

Skills you'll gain: Cryptography, Security Requirements Analysis, Network Architecture, Network Security, Internet Of Things, Cybersecurity, Web Services, Advanced Encryption Standard (AES), Encryption, Embedded Systems, Network Protocols, Public Key Cryptography Standards (PKCS), Communication Systems, Threat Modeling, Security Controls, Simple Object Access Protocol (SOAP), TCP/IP, Web Applications, Restful API, Information Privacy
Intermediate · Course · 1 - 3 Months

Skills you'll gain: Restful API, Android Development, Kotlin, API Design, Android Studio, Application Programming Interface (API), Android Jetpack, Mobile Development, Database Application, Database Management, Data Persistence, Databases, JSON, Database Development, Web Applications, Back-End Web Development, SQL, Data Access, Relational Databases
Intermediate · Course · 1 - 3 Months

University of Colorado Boulder
Skills you'll gain: Operations Research, Algorithms, Graph Theory, Network Model, Combinatorics, Mathematical Software, Mathematical Modeling, Theoretical Computer Science, Model Optimization, Python Programming
Build toward a degree
Advanced · Course · 1 - 4 Weeks

Skills you'll gain: Equities, Capital Markets, Investment Banking, Business Valuation, Financial Modeling, Securities (Finance), Global Marketing, Market Share, Financial Reporting, Financial Forecasting, Financial Statement Analysis, Accounting, Financial Analysis, Market Dynamics, Forecasting, Financial Statements, International Finance, Financial Regulations, Cash Flows, Underwriting
Mixed · Course · 1 - 3 Months

Scrimba
Skills you'll gain: HTML and CSS, Hypertext Markup Language (HTML), Responsive Web Design, Cascading Style Sheets (CSS), Web Development Tools, Web Design, Application Deployment, Web Design and Development, Computer Programming Tools, Development Environment, Software Development Tools, UI Components, Web Development, Front-End Web Development, User Interface (UI), Interactive Design, Collaborative Software, Design Elements And Principles
Beginner · Course · 3 - 6 Months

Skills you'll gain: Organizational Development, Performance Management, Team Performance Management, Performance Appraisal, Workforce Development, Employee Performance Management, Business Transformation, Organizational Change, Team Management, Talent Management, Quality Management, Mergers & Acquisitions, Quality Improvement, Human Resources Management and Planning, Organizational Structure, Leadership Studies, Human Resource Strategy, Organizational Effectiveness, Employee Engagement, Change Management
Beginner · Specialization · 3 - 6 Months

LearnQuest
Skills you'll gain: Agentic Workflows, Generative AI Agents, Agentic systems, AI Workflows, AI Enablement, Responsible AI, Artificial Intelligence, AI Security, Technical Communication, Automation, AI Integrations, Workflow Management, Risk Analysis, Business Workflow Analysis, Process Mapping, Governance
Beginner · Course · 1 - 4 Weeks

Amazon Web Services
Skills you'll gain: Cloud Security, Encryption, Amazon Web Services, Data Security, Cryptography, Security Controls, Cryptographic Protocols
Mixed · Course · 1 - 4 Weeks

AI CERTs
Skills you'll gain: Regulatory Compliance, Agentic Workflows
Beginner · Course · 1 - 3 Months

LearnQuest
Skills you'll gain: Virtual Private Networks (VPN), Linux Administration, Public Key Infrastructure, Linux, Linux Servers, Intrusion Detection and Prevention, Firewall, Remote Access Systems, Operating System Administration, Linux Commands, Authentications, Authorization (Computing), Network Security, Hardening, Security Controls, Infrastructure Security, Identity and Access Management, System Monitoring, Cybersecurity, Information Technology
Beginner · Course · 1 - 4 Weeks

University of Colorado Boulder
Skills you'll gain: File I/O, C and C++, Data Import/Export, C++ (Programming Language), Communication Systems, C (Programming Language)
Advanced · Course · 1 - 3 Months

University of Colorado Boulder
Skills you'll gain: Sustainable Design, Sustainable Business, Sustainable Technologies, Operations Management, Sustainable Systems, Manufacturing Operations, Sustainability Standards, Corporate Sustainability, Strategic Leadership, Business Leadership, Operational Efficiency, Climate Change Mitigation, Organizational Leadership, Product Design, Waste Minimization, Process Design, Digital Transformation, Emerging Technologies
Build toward a degree
Beginner · Course · 1 - 4 Weeks