When Marnie Blewitt was designing her first online epigenetics course, she knew that she would need help. A geneticist at the University of Melbourne in Australia, Blewitt was new to the business of MOOCs — massive open online courses that can reach thousands or even hundreds of thousands of students around the globe.
Blewitt enlisted Kylie Greig, a biology postdoc with an aptitude for technology, to help her to construct quizzes, create instructional slides and images and manage online student forums during the six-week course, which launched on 1 July on Coursera in Mountain View, California — the largest MOOC platform worldwide. Blewitt and Greig will also work together to analyse test data and determine whether they need to add new content to clarify certain principles.
The help was crucial. “It is a very different feeling from a regular university course,” says Blewitt. “The sheer number of students just really adds to the pressure, and also the knowledge that people will post immediately if they don't like it.”
In the past couple of years, academic institutions, policy centres and research institutes around the world have become partners with MOOC providers including Coursera, edX in Cambridge, Massachusetts, and Udacity in Mountain View (see Comment, page 275). Coursera has so far registered 9.5 million enrolments; edX counts some 1 million. Institutions or instructors looking to go it alone can post lecture videos on YouTube.
MOOCs, which are usually free of charge, have course assignments and exams like their on-campus cousins, but they also feature discussion boards on which tens of thousands of students can gather to share ideas and discuss lectures. Course subjects are as disparate as the students, ranging from 'Artificial Intelligence for Robotics' to the 'History of Rock: Part Two' (which covers music, not minerals).
Instructors may feel daunted by the challenge of making a popular course shorter, livelier and easily understood on a computer screen. However, experienced MOOC designers say that the task is well worth the effort, because the courses allow for experimentation on a grand scale. Although it does not generally bring in extra pay, MOOC work gives teachers a chance to develop fresh methods for teaching science, bringing it to new, uninitiated audiences and encouraging cutting-edge discussions.
A different world
MOOC creation requires rigorous attention to detail, with long hours of preparation and instruction. Successful courses are more than a lecture uploaded to the Web, say experts, and they serve a broader and more varied audience than other types of distance learning.
“Instructors designing MOOCs have to think through the whole new medium,” says Anant Agarwal, president of edX and a computer scientist at the Massachusetts Institute of Technology (MIT) in Cambridge. “How can materials be given to students in bite-sized chunks? You cannot stand at a board and talk for an hour, because students will lose interest, and you have to use discussion boards to guide student conversations about the material.”
MOOCs also differ from on-campus teaching in that students do not necessarily learn the same thing at the same time. Udacity makes its courses available all year round, so that students can work at their own pace, and MOOCs on YouTube or other online-learning sites may be available in perpetuity, although instructors or universities often take down outdated material. By contrast, edX and Coursera offer courses at specific scheduled times, to ensure that student discussion boards and forums are monitored, and that all students are at the same point in their studies.
One of the benefits of MOOCs is the ability to make frequent updates to reflect changes in technology or the thinking on a subject. Eric Lander, a biologist at MIT, teaches an introductory biology class that he has adapted into a MOOC for edX. He taught it for the first time in March, and will run it again in September. But before that, he plans to revise it, adding new video lectures to reflect lessons learned during the first course. “We asked ourselves, 'If we have access to Web-based media, how would we do the course differently for online students?',” says Lander. For his team, the answer was to inject technologies that they had not used before, namely animations and three-dimensional models.
Graduate student Brian Lovett helps teacher Raymond St. Leger set up for a palaeogenomics lecture.
Another prized advantage of MOOCs is the discussion boards. These need to be guided and monitored, but they can host intense debates and thought-provoking dialogues about the subject matter, the course and even the instructor. And active boards encourage students to rate peer comments, often creating a chatting frenzy. They also allow for peer-to-peer learning, with students, for example, coaching each other on homework assignments or helping to review each other's quiz results.
When it comes to designing a MOOC, instructors recommend that first-timers recruit a support team — perhaps including curriculum-development specialists, computer programmers, videographers or tech-savvy teaching assistants — to help them to clear pedagogical and technical hurdles (see 'Get started in MOOCs'). “It takes a village,” says Lander. “I've taught my course for 23 years, and I know the material, but I needed help to convert it to a new platform, so it was good to have the outside expertise,” he says. On campus, his course enrols as many as 850 students at a time; online, it drew some 35,000 students.
Box 1: Get started in MOOCs
- Reach out to experts in curriculum development and technology for guidance.
- Develop a list of learning goals that can be accomplished in brief video segments or through methods such as readings, discussion boards and guest lectures.
- Don't dumb it down, but do prepare background materials for non-scientists.
- Film lab experiments, create interactive tools and slides, and develop problem sets rendered with three-dimensional graphics.
- Try out videos, online quizzes and animated models on a small cohort first.
- Students may access material at different times and out of order, so avoid mentions of lecture dates, times and content sequence.
- Practice the lecture before taping.
- Hire an assistant to help in monitoring forums and distributing communications.
- Make course expectations regarding accessing homework and quizzes clear early on, while also mapping out deliverables.
- Encourage student-to-student interaction and mentoring in online forums.
- Collect data on student learning to improve the next iteration of the course. S.K.
Standing out in the crowd
Most MOOC companies offer comprehensive services to help instructors to design their classes, assess student learning and create assignments. Some instructors think that these systems make the courses more generic by, for example, removing the distinct voice of the teacher. But many believe that the benefits outweigh the downside: sacrificing some personal lecturing style allows them to simplify the MOOC-creation process and gain the input of technology experts. Practised instructors say that teachers should think about what they want the students to learn and experience, rather than letting the platforms drive the content.
Instructors should also rethink their lecture styles, even down to their body language. Enthusiastic teaching with broad gestures and loud voices may add drama in a lecture hall, but it is a distraction on a small screen. Veteran instructors recommend that novices record lectures in front of students in a lecture hall or in smaller groups, and that they take time to acclimatize to the technology — which can include high-tech cameras and green screens for inserting different background. “I had to learn to be more still because the camera picks up movement,” says Raymond St. Leger, an entomologist at the University of Maryland in College Park, who taught a MOOC on Coursera in April. He worried about giving a leaden performance after lots of rehearsing. “I had to get used to teaching to a blinking light on the camera and learn how to be more spontaneous.”
“Overall, I think there's an optimal mix of entertainment and instruction that keeps students interested while still being useful for learning the material,” says Michael DeWeese, a physicist at the University of California, Berkeley, who has taught an introductory physics class as an online course. It is now posted on YouTube.
Know your audience
It is crucial to consider who the students will be. Some may have degrees in the discipline, but others will have little or no experience. Veteran instructors say that it is essential to provide background information that lays out basic principles and knowledge early in the course.
“Online students are different from students on campus,” says Michael Evans, a chemist at the University of Illinois at Urbana-Champaign, who has worked with his PhD supervisor, Jeffrey Moore, to design and teach an organic-chemistry course on Coursera. “Online students are older and they're looking for real-world applications for what they're learning.”
Evans says that instructors need to be imaginative with their lectures because they do not have forces such as peer pressure keeping students in seats, as they would in the classroom. “People have different ways of teaching things, but with video, you only have one chance to say something,” says Evans, noting that a failure to keep the online class engaged can result in hundreds, if not thousands, of students logging off. “There are no tangents or wandering off. You get a snapshot in time, and it doesn't allow for even good digressions.” He suggests avoiding anecdotes and verbal detours that make sense in the classroom but might not work online.
WALTER AND ELIZA HALL INST.
Marnie Blewitt: “It is a very different feeling from a regular university course.”
Some sceptics remain doubtful that MOOCs can foster a satisfactory learning experience, no matter what technologies are used. They worry that students do not acquire the same breadth of knowledge as in a classroom-based course, and that potentially important bits of content can be left out. Efforts such as discussion boards do not really create a sense of community that replicates a classroom, says Carl Wieman, director of the Carl Wieman Science Education Initiative at the University of British Columbia in Vancouver, Canada. “I wouldn't deny that's possible,” he says. “I would deny that anybody has demonstrated they have technology that can do it.”
Concerns such as these can be mitigated by community-building technologies that allow students to build connections with each other and their teachers. Instructors can offer one-on-one discussions using Web-based communications programmes; they can also get involved in interactions on discussion forums.
For early-career instructors, the broad appeal of MOOCs can offer something else: name recognition. “Younger faculty do see it as an opportunity for fame, if not fortune,” says Evans. “You can really get your name out there far faster.” That means that the stakes are high. “We taught more students in this one course,” says St. Leger, “than we probably will teach in person for the rest of our careers.”