Lee Gass

Published in
Centre for Development of Teaching and Learning
National University of Singapore
July 1998.

In my first year of teaching high school biology I discovered a large pile of scientific magazines. I hired students to examine, cross-index, and enter hundreds of articles into a simple system of punched cards. By running a knitting needle through a hole representing a topic of interest, and lifting, cards on the topic fell out. Sorting on other criteria reduced the set, and information on the cards allowed students to select articles to read. I developed the system that year and used it the next in 10th grade survey and 11th and 12th grade research courses. (A computer-based system would be easy to develop now, but summarizing articles would remain labour-intensive.) Tenth graders read and reported on any article each week in addition to their other work, and research students read two. The system was fast, easy, and ran by itself with no supervision by me, in parallel to the two courses. Once we began, students filed their reports each week without reminding, and they enjoyed it.

The research course was very successful. I rarely lectured, and used few structured exercises after the first month, so there were always many kinds of activities in the classroom. I helped when necessary, but tried to stay out of students' way and let them do their research. Sometimes they spent several days in succession without interacting directly with me at all. All teams did excellent original research, several got publishable results, and one student later completed a PhD on the project he began in the 11th grade. Later I learned that not only were the research students not disadvantaged by their year of research, but they enjoyed strong advantages as undergraduates, even in traditional courses.

One day, two research students sat in a corner, talking. Periodically they argued, but they were fully engaged and I didn't disturb them. The next day they asked to go to the nurse's office; they needed a quiet place to do an experiment. Without probing, I let them go. On the third day they approached me again. They had read an article on conduction of sound by bone, and after designing and performing their own experiment to test the main point of the article, they decided that the article was wrong.

The article contended that sound reaches the nerve endings in our inner ears not only through our ears, but through our bones as well. It offered a demonstration. If you hum quietly and listen, then plug your ears with your fingers and hum again, it should be louder. The boys agreed with the result, but disagreed that it proves bone conducts sound to our ears. It was consistent with that interpretation, they argued, but it was also consistent with the null hypothesis that bone does not conduct sound. They concluded that the demonstration was inconclusive, and met that night to design an experiment that they performed in the nurse's office the second day. In their experiment, a "hummer" plugged a "listener's" ears and then hummed. They reasoned that if sound is conducted by bone, then it would grow as loud under this condition as it had in the other experiment. Alternatively, if it grew quieter this would refute the hypothesis. In the nurse's office they repeated both conditions many times, taking careful notes. In every case the sound grew louder under the first condition and quieter under the second. Correctly, given a hidden, implicit, and incorrect assumption they had made in reading the article, they concluded incorrectly that the authors' interpretation was wrong and sound is not conducted by bone.

The boys' conclusion was wrong. But there was something right about what they did to reach it. Most of their deductive logic was solid, and their experimental design, the care that they took in executing it, and how they interpreted their result were flawless. Unfortunately or not, they made a mistake in one of the most difficult things that scientists must learn to do in their work: to know it when we assume things. They assumed that the authors meant that our shoulder, arm, and finger bones conduct sound to our ears when we plug them, and their experiment indeed refuted that, but the authors were writing about skull bones! But for that critical assumption in a critical place, the boys were impeccable creative scientists and I was proud of them. When they realized their hidden assumption they reinterpreted the data and had a good laugh with no loss of face. The next day they proudly presented the story to the rest of that class, to my other research class, and to a 10th grade class, then wrote it up as a scientific investigation. Everyone had a good time, the boys gained fame and prestige for their courage and creativity, everyone learned important things about science (including that it is an exciting and dangerous enterprise), about language, and about assumptions. I think we spent the time well.

The example illustrates a way of teaching and learning that must become common in Singaporean schools and universities, in my view, if students are to become the creative problem solvers that national policy envisions. What does it illustrate?

We learn to work creatively by confronting real problems that matter to us personally. This a profound truth expressed throughout the vast literature on creativity. We can help in many ways, but we cannot supply the imagination that humans are born with (but that their families and teachers traditionally suppress). In this case the boys discovered the problem for themselves, "forced" by the weekly reading assignment, and worked independently to solve it. My only input was to help them uncover their hidden assumption and gain rather than lose face from their error.

There are many ways to organize experiences like this for students, so the lesson is not that they must work independently at all stages. But it must be their research whether they discover it or not. They must own it emotionally, become engaged in it actively, and work without interference from more experienced people, either independently or cooperatively with other students, during the creative stages of logical development, experimental design and execution, and interpretation. The key is to encourage process over product in the short term, but insist on high standards of product in the end. For many reasons this is a major challenge for most teachers, but the payoff is deeper, longer-lasting learning.

Teachers must make it safe to make mistakes and encourage high standards. These are not in conflict in principle, but they are traditionally in practice. Traditional ways of teaching, especially in the university, sacrifice the freedom to err for high standards, paradoxically inhibiting development of creative problem-solving skills. In terms of the dynamics of human development, the core issue is emotional, not directly intellectual, and it is the single most critical issue that I identified at NUS. NUS science students do not trust their teachers enough to risk thinking critically in class. They understand that to think creatively is to risk error, and they'd rather not. However, most of them were happy to risk with a safe, gentle stranger who knew what he was doing. Your students' minds are fine, although they are not practiced in thinking with them. Until they do feel safe enough to do it with you, there will be something seriously wrong with their learning environment and you will be unable to help them learn to think effectively. Trust and respect are central in education; they far overshadow nearly everything else.

Students don't merely feel unsafe. They are unsafe, in some cases inexcusably so. I saw NUS professors interrupt students aggressively to correct incorrect assumptions, in one case embarrassing them severely. The professor gained great face (although not in my eyes), and the students lost more. Professors everywhere and at every level must stop actively discouraging their students from thinking. We are right to insist on high standards, but absolutely wrong in failing to encourage processes that generate mistakes.

Mistakes are worth bragging about. 3M Corporation advertises the most magnificent failures of its employees throughout the corporation, and rewards them financially and with time released from normal duties to try new things. This is a way of encouraging creative imagination, and it works. Last term I asked a group of NUS undergraduates whether it could work in Singapore to make heroes of students who fail in creative efforts. They found the idea intriguing, and concluded that the peer recognition it would generate would be an important factor. They cautioned me, however, that both parents and teachers would have to be brainwashed to understand the value, or they would torpedo the idea.

A teacher's job is not to teach students. A teacher's responsibility is for students to learn. These are not the same. I have come to believe that for professors to shift from thinking of themselves as conveyors of information to facilitators of learning is the single most important shift they can make.

This story is one of many I could tell to illustrate an approach to teaching for creativity in science. Simply, this approach minimizes my direct interference with students' learning, while at the same time providing rich opportunities for them to discover. It does not preclude guiding students when necessary, but is not based on that presumption. Perhaps most importantly, the story reminds me that although I am responsible for everything that occurs in my classroom, I do not and cannot plan all of it in detail. I planned the reading/writing assignment believing that "good things would result", but I had no clear expectations. The specific keys to this and many other examples are 1) to provide freedom for students to discover things, 2) to respect their efforts, and 3) to protect them from suffering loss of face, either at my hands or those of their peers.