Free courses
Produced by The Open University, a world leader in open and distance learning, all OpenLearn courses are free to study. We offer nearly 1000 free courses across 9 different subject areas. Our courses are available to start right away.
- All topics
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level 2: intermediate icon
Science, Maths & Technology
Obesity: balanced diets and treatment
The incidence of obesity is on the increase in affluent societies, and the phenomenon commands increasing attention from health professionals, legislators and the media. This free course, Obesity: balanced diets and treatment, looks at the science behind obesity, examining the dietary, physiological and genetic aspects of the topic.
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level 2: intermediate icon
Science, Maths & Technology
Introduction to active galaxies
The field of active galaxies is recognised as one of increasing importance. But how do we know there are different kinds of galaxy? What are active galaxies? How are they powered? This free course, Introduction to active galaxies, examines the different types of active galaxies and looks at the crucial role of the active galactic nucleus and the...
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level 1: introductory icon
Science, Maths & Technology
Diagrams, charts and graphs
Diagrams, charts and graphs are used by all sorts of people to express information in a visual way, whether it's in a report by a colleague or a plan from your interior designer. This free course will teach you how to interpret these tools and how to use them yourself to convey information more effectively.
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level 3: advanced icon
Science, Maths & Technology
Tay Bridge disaster
The sudden collapse of Scotland's Tay Bridge in 1879 killed more than 70 rail passengers and shocked the population. An extensive inquiry was carried out, including numerous witnesses, experts and reports. Were the high winds that night to blame, or were poor design or mechanical failure at fault? This free course re-examines some of the ...
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Nature & Environment
Aquatic mammals
Mammals come in a bewildering variety of shapes and sizes and yet all of the 4700 or so species have some characteristics in common, which justifies the inclusion of diverse types within a single group. Although mammals evolved on land, a number of species have become adapted to spending part or all of their lives in water and it is these ...
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level 1: introductory icon
Science, Maths & Technology
Rounding and estimation
Scientific calculators are a wonderful invention, but they're only as good as the people who use them. If you often get an unexpected or ridiculous result when you press the enter button, this free course, Rounding and estimation, is for you. Learn how to do a calculation correctly and get the right answer every time.
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level 2: intermediate icon
Science, Maths & Technology
An introduction to minerals and rocks under the microscope
In this free course, An introduction to minerals and rocks under the microscope, you will experience the study of minerals using a polarising microscope. While the study of minerals can involve electron or ion beam chemical analysis, the polarising microscope remains the prime tool for the study of rock thin sections and is the foundation of ...
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level 2: intermediate icon
Science, Maths & Technology
The restless Universe
The restless Universe introduces you to major achievements and figures in the history of physics, from Copernicus to Einstein and beyond. The route from classical to quantum physics will be laid out for you in this free course without recourse to challenging mathematics but with the fundamental features of theories and discoveries described in ...
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level 1: introductory icon
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Science, Maths & Technology
Moons of our Solar System
In this free course, Moons of our Solar System, explore the many moons of our Solar System. Find out what makes them special. Should we send humans to our Moon again?
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level 1: introductory icon
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Science, Maths & Technology
Can renewable energy sources power the world?
We ask the question ‘Can renewable energy sources power the world?’ as a response to the growing awareness that increased use of renewable energy technologies is making a major contribution to global efforts to limit anthropogenic climate change. The course begins by examining the environmental concerns that have caused a rise in interest in ...
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level 1: introductory icon
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Science, Maths & Technology
Citizen science and global biodiversity
This free course, Citizen science and global biodiversity, deals with the importance of biodiversity and explores how anyone can contribute to and be involved in identifying and recording wildlife, as a citizen scientist. It looks at what citizen science is, and how citizen science facilitates public involvement in scientific research ...
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level 1: introductory icon
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Science, Maths & Technology
Astronomy with an online telescope
This free course shows you how to navigate the night sky, and introduces the wide variety of objects it contains. You will develop a hands-on understanding of telescopic observations using the Open University’s own robotic telescope facility COAST sited on the island of Tenerife. Supported by your own measurements we illustrate how stars...