Here are the 20 most popular free online university courses and massive open online courses (MOOCs) starting in April 2023, based on Class Central learners’ activity.

If you don’t find what you’re after here, browse Class Central’s extensive catalog of over 100K online courses via our subjects page, or have a look at our thematic collections:

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Problem-Solving
Arizona State University via Coursera
This course will put the tools, knowledge and strategies of problem-solving directly into your hands. You’ll learn the fundamentals and get acquainted with your problem-solving toolkit. Then, you’ll directly apply them in hands-on scenarios.

Business Analytics with Excel: Elementary to Advanced
Johns Hopkins University via Coursera
This class introduces students to analytical frameworks used for decision making though Excel modeling. Emphasis will be not on the “how-to” of Excel, but rather on formulating problems, translating those formulations into useful models, and interpreting results.

How to Create an Online Course
University of Edinburgh via Coursera
On this two-week course, you’ll learn how to create online learning materials that are open, accessible, and engaging. You will complete practical activities to explore key topics such as target audience, writing style and narrative, active learning, and digital tools.

Decision Making and Reinforcement Learning
Columbia University via Coursera
This course is an introduction to sequential decision making and reinforcement learning. We start with a discussion of utility theory to learn how preferences can be represented and modeled for decision making.

Managing Stress and Time
Arizona State University via Coursera
Stress is a universal experience. Thankfully, both time and stress management are skills that can be learned and developed. Everyone has the capability to effectively manage their stress and time, and this course will help you unlock that potential.

Immunology: Immune System and Infectious Diseases
Imperial College London via Coursera
In this course, you will learn about the different types of pathogens, their confrontation with human immune system, and the dramatic consequences of their evasive strategies.

Digital Content Planning and Management
University of Illinois at Urbana-Champaign via Coursera
This practical course is designed for current career-professionals who want to learn how to build a real-world content strategy and a plan to execute it. You will leave this course with an understanding of how create, manage, review and govern digital content.

Bring Your Story to Life – Video Post-Production
University of Colorado Boulder via Coursera
In this course, we will explore the power and artistry of picture and sound editing. Although you’re welcome to use the editing software of your choice, we’ll be demonstrating non-linear editing using Adobe Premiere.

Between Physical and Sofware: Fault Attacks, Side Channels, and Mitigations
Graz University of Technology via edX
We will look at fault attacks that can be triggered from software. We will also learn that some transient-execution attacks have some similarities to fault attacks. You will implement some of these attacks yourself and learn how they are mitigated.

Decision-Making
Arizona State University via Coursera
Learn how to apply an ethical framework, select the best alternative, and perform a risk assessment to be able to take decisive action.

How to Create Video for Online Courses
University of Edinburgh via Coursera
On this two-week course from the University of Edinburgh, you’ll learn how to turn your mobile phone into a full-featured video production suite to create effective and engaging online course videos and media.

Wilderness First Aid – Medical Emergencies
University of Colorado System via Coursera
In this course, students will learn to identify and treat common traumatic injuries in the wilderness, and how to identify the difference between blunt and penetrating trauma.
★★★★★ (1 rating)

Practical Finance for Entrepreneurial Creatives
Rutgers University via Coursera
In this one-of-a-kind course designed for non-business majors with entrepreneurial aspirations, you will learn how the personal is truly the foundation for the professional—how the same principles that govern good personal financial management are directly applicable to and a critical success factor for whatever entrepreneurial venture you may have in mind.

Becoming a Certified SAP Professional
SAP via Coursera
By the end of this course, you will know the next steps you need to take to become an SAP professional and have a clear understanding of the different industries, portfolios, and domains you may want to specialize in as an SAP professional.

Search Engines for Web and Enterprise Data
The Hong Kong University of Science and Technology via Coursera
This course introduces the technologies behind web and search engines, including document indexing, searching and ranking. You will also learn different performance metrics for evaluating search quality, methods for understanding user intent and document semantics, and advanced applications including recommendation systems and summarization.

Engaging in Strategic Management in Healthcare Organizations
Northeastern University via Coursera
This course presents and discusses analytical frameworks for making strategic decisions, drawing on different disciplines, including economics and management. You will get an understanding of how strategic decisions are made within organizations.

Climate change and health
Imperial College London via Coursera
Designed for those new to the discipline, over four modules (intended for one week of learning each), learners will become familiar with the relationship between globalisation, environmental change and health.

Use C++ to build a crypto trading platform
University of London International Programmes via Coursera
In course, you will implement the matching engine for the crypto-currency exchange platform. You will learn about C++ vector iterations, test data to evaluate the matching engine algorithm, and deepen your knowledge about exception handling to write robust code.

Reigniting Employee Engagement
University of Michigan via Coursera
This course introduces three interactive levers, which can be used to reignite employee engagement. These levers include strategies and tools for surfacing what others care about, how to increase their confidence and ways to take better control of the comparisons that influence how we make sense of our environment.

Family Spirit Nurture
Johns Hopkins University via Coursera
Learners will gain knowledge and skills to make a positive impact on healthy infant nutrition and growth as well as maternal and family nutrition. This course is uniquely tailored towards Indigenous families and approaches nutrition through a strengths-based lens connecting to Indigenous foods and Native Foodways.

Decarbonization of Heat – An Introduction to Sustainable Heating and Cooling Systems
Delft University of Technology via edX
Gain a comprehensive overview of all the technologies that can deliver sustainable heating and cooling systems. Learn to identify technically feasible and cost-efficient solutions in your own heating and cooling decarbonizing projects.