{"id":83043,"date":"2025-03-18T08:16:00","date_gmt":"2025-03-18T07:16:00","guid":{"rendered":"https:\/\/aktuelles.uni-frankfurt.de\/?p=83043"},"modified":"2025-03-13T16:26:50","modified_gmt":"2025-03-13T15:26:50","slug":"learning-physics-is-difficult-you-constantly-have-to-re-learn-things","status":"publish","type":"post","link":"https:\/\/aktuelles.uni-frankfurt.de\/en\/english\/learning-physics-is-difficult-you-constantly-have-to-re-learn-things\/","title":{"rendered":"\u201cLearning physics is difficult \u2013 you constantly have to re-learn things\u201d"},"content":{"rendered":"<p><strong>Thomas Wilhelm, who has won several awards for his approach to teaching physics, explains why physics lessons sometimes aren\u2019t very successful, and how we can improve them \u2013 using computer programs, for instance. In January, new online teaching materials on \u201cmotion\u201d were made available to schools.<\/strong><\/p>\n\n\n\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full\"><img fetchpriority=\"high\" decoding=\"async\" width=\"650\" height=\"450\" src=\"https:\/\/aktuelles.uni-frankfurt.de\/wp-content\/uploads\/2025\/02\/beitragsbild-physiklernen-thomas-wilhelm-650x450px.jpg\" alt=\"Frankfurt experts in the didactics of physics give teachers materials for video motion analysis using an iPad. \" class=\"wp-image-82511\" srcset=\"https:\/\/aktuelles.uni-frankfurt.de\/wp-content\/uploads\/2025\/02\/beitragsbild-physiklernen-thomas-wilhelm-650x450px.jpg 650w, https:\/\/aktuelles.uni-frankfurt.de\/wp-content\/uploads\/2025\/02\/beitragsbild-physiklernen-thomas-wilhelm-650x450px-300x208.jpg 300w, https:\/\/aktuelles.uni-frankfurt.de\/wp-content\/uploads\/2025\/02\/beitragsbild-physiklernen-thomas-wilhelm-650x450px-500x346.jpg 500w, https:\/\/aktuelles.uni-frankfurt.de\/wp-content\/uploads\/2025\/02\/beitragsbild-physiklernen-thomas-wilhelm-650x450px-18x12.jpg 18w\" sizes=\"(max-width: 650px) 100vw, 650px\" \/><figcaption class=\"wp-element-caption\">Frankfurt experts in the didactics of physics give teachers materials for video motion analysis using an iPad.<\/figcaption><\/figure>\n\n\n\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p><strong>UniReport: Professor Wilhelm, most schools don\u2019t implement the ideas for teaching physics that come out of research \u2013 something your doctoral student Jakub Knebloch discovered during his interview with teachers. The reasons they gave were \u201cWe don\u2019t have enough time\u201d or \u201cThe suggestions from university didactics are too ambitious and unsuitable for everyday school lessons.\u201d What is the problem \u2013 is it the situation in schools or the teaching ideas that come from the university?<\/strong><\/p>\n\n\n\n<p><strong>Thomas Wilhelm:<\/strong> One thing I want to make clear directly is that we are not engaging in any kind of teacher-bashing. Many physics teachers are passionate about their subject and work very hard at transmitting it to their students. Be that as it may, we still find that many of these basic ideas don\u2019t \u201cget\u201d to the children during lessons. Even after finishing a class on a physics topic, they often have the same misconceptions as before.<\/p>\n\n\n\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p><strong>So, children come to lessons with misconceptions?<\/strong><\/p>\n\n\n\n<p>What I mean by that is that they come to their physics lessons with everyday conceptions \u2013 about what constitutes force, energy, electric current, heat and light, for instance. These ideas are quite different than the concepts used in physics.<\/p>\n\n\n\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p><strong>Could you give an example\u2026?<\/strong><\/p>\n\n\n\n<p>For instance, we think that we see because we look at something; in physics we learn that the object emits light that reaches our eyes. In colloquial German we say we need \u201cKraft\u201d (\u201cforce\u201d) to do something; but in physics we learn that one cannot \u201chave\u201d force, and that a force only exists at a particular moment during an interaction. What this shows is that everyday language and the technical language of physics don\u2019t match up. That makes learning physics so difficult \u2013 you constantly have to re-learn things.<\/p>\n\n\n\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p><strong>Does that mean schoolchildren\u2019s initial ideas about physics are wrong?<\/strong><\/p>\n\n\n\n<p>When beginning a topic, it\u2019s not really advisable to tell them that physics ticks differently than they do. It\u2019s better to start with ideas that are more or less correct and build on them.<\/p>\n\n\n\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p><strong>Are physics teachers aware of that?<\/strong><\/p>\n\n\n\n<p>They didn\u2019t use to be, and most assumed that children had no prior knowledge and it would therefore be simple to teach them the \u2018ways of physics\u2019. As a result of these special difficulties, physics was one of the first subjects to investigate pupils\u2019 preconceptions, as early as the 1970s. This means we now have teaching concepts that take into account these learning difficulties. My colleagues and I have developed many such concepts and, most importantly, tested them empirically in actual lessons. I have meanwhile also published a book outlining concepts that differ from the traditional ones. Nevertheless, some very old concepts continue to be used.<\/p>\n\n\n\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p><strong>After coming to Frankfurt in 2012, you founded a \u201cschoolchildren\u2019s laboratory\u201d \u2013 today, some 4,000 children come here each year, making it Goethe University\u2019s largest laboratory of its kind. You use it both for teaching and to research these new didactic concepts.<\/strong><\/p>\n\n\n\n<p>First and foremost, the schoolchildren\u2019s laboratory is of course a service for nearby schools. As such, we introduce children to topics that the schools often don\u2019t have time for. But the laboratories are also good places to conduct didactic research, whereby we take into account both sides: We examine how teaching concepts are accepted by the pupils, and we survey the teachers.<\/p>\n\n\n\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<figure class=\"wp-block-image alignright size-full is-resized\"><img decoding=\"async\" width=\"650\" height=\"450\" src=\"https:\/\/aktuelles.uni-frankfurt.de\/wp-content\/uploads\/2025\/02\/beitragsbild-physiklernen-650x450px.jpg\" alt=\"Physics educationalist Thomas Wilhelm is driven by the question of how children can understand more in physics lessons.\" class=\"wp-image-82510\" style=\"width:458px\" srcset=\"https:\/\/aktuelles.uni-frankfurt.de\/wp-content\/uploads\/2025\/02\/beitragsbild-physiklernen-650x450px.jpg 650w, https:\/\/aktuelles.uni-frankfurt.de\/wp-content\/uploads\/2025\/02\/beitragsbild-physiklernen-650x450px-300x208.jpg 300w, https:\/\/aktuelles.uni-frankfurt.de\/wp-content\/uploads\/2025\/02\/beitragsbild-physiklernen-650x450px-500x346.jpg 500w, https:\/\/aktuelles.uni-frankfurt.de\/wp-content\/uploads\/2025\/02\/beitragsbild-physiklernen-650x450px-18x12.jpg 18w\" sizes=\"(max-width: 650px) 100vw, 650px\" \/><figcaption class=\"wp-element-caption\">Physics educationalist Thomas Wilhelm is driven by the question of how children can understand more in physics lessons.<\/figcaption><\/figure>\n\n\n\n<p><strong>You like using computers, tablets and smartphones in physics lessons, which some teachers might dismiss as simply too much. Be that as it may, the cooperative project you implemented with the Hessian Ministry of Education and which ended last year will offer teachers a lot of free materials on the topic of \u201cmotion\u201d from 2025 onwards.<\/strong><\/p>\n\n\n\n<p>For my <em>Habilitation <\/em>I was already researching how schoolchildren can analyze and visualize motions that are previously filmed. A computer program records where the object is at what time, what its velocity and acceleration are, and what forces are acting on it. So, we\u2019re dealing with real, filmed motion and no longer with small objects moving along the lab bench. In January, we made available on our website <a href=\"https:\/\/www.physik.uni-frankfurt.de\/videoanalyse-ipads\" target=\"_blank\" rel=\"noreferrer noopener\">new tutorials, videos and worksheets for use with iPads<\/a>.<\/p>\n\n\n\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p><strong>Your doctoral student Jannis Weber has researched in more detail how computers can be used to help children learn about mechanics.<\/strong><\/p>\n\n\n\n<p>Yes, one option is to film a motion and then measure its course. Another way of approaching the topic would be to consider a particular motion and which forces are involved, and get a computer to calculate how the object should move. Then we can check whether the motion visualized on the basis of our calculation really is what we observed. This approach allows children to learn something about motion and forces by gaining access to both topics in a totally different way. To answer the question of which of the two methods is more useful, we carried out identical experiments in the schoolchildren\u2019s laboratories. Many had expected the youngsters to enjoy experimenting and anticipated that they would find it boring to use computers for the calculations and modelling, both of which most would not understand. In the end, the result was an entirely different one. There were hardly any differences between the two children\u2019s laboratories: The children learned a lot in both and had just as much fun.<\/p>\n\n\n\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p><strong>Why are new concepts like this not yet used in many curricula?<\/strong><\/p>\n\n\n\n<p>As part of the teachers\u2019 survey I mentioned, my doctoral student discovered that many physics teachers simply aren\u2019t aware of these new teaching concepts. They never encountered them \u2013 neither as students not as teachers \u2013 also because no special channels exist for disseminating this information. The second problem is that the curriculum is simply full, making it extremely difficult to prepare and introduce new things. Other aspects here are too many regulations, too high a workload, et cetera. The third point is that some teaching concepts developed by educationalists at universities are just not practical in the classroom \u2013 making this an issue that has nothing at all to do with the teachers, but with the didactic theorists, who don\u2019t publicize their ideas enough and also don\u2019t ensure that they can easily be put into practice in class. We are now starting to see our empirically tested concepts slowly finding their way into the school curricula. As such, the concept for introducing mechanics and the one for electrical circuits are now on the curriculum in Hamburg, Bavaria and Austria. In some parts of Germany, however, this process is taking longer.<\/p>\n\n\n\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p><strong>Why is that?<\/strong><\/p>\n\n\n\n<p>There are some federal states where an expert commission scouts good concepts and then prescribes them in schools. In Hesse, on the other hand, there\u2019s only a core curriculum at secondary level I \u2013 leaving the teachers a lot of freedom to decide what they teach, how, and when. The schools are then required to draw up a school curriculum \u2013 which becomes a problem because there\u2019s no time to read the research literature\u2026<\/p>\n\n\n\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p><strong>So, this freedom sometimes results in everything staying the same?<\/strong><\/p>\n\n\n\n<p>If a school has teachers who are interested in research into didactics, they can have a very modern school curriculum. In my view, however, many schools are unable to cope.<\/p>\n\n\n\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p><strong>For the first time since 1980, a female physicist has now been awarded the Robert Wichard Pohl Prize by the German Physical Society (DPG) in recognition of her achievements in the didactics of physics. You, Mr. Wilhelm, were awarded the prize the year before. There are also several other Frankfurt laureates. The latest among them, Rita Wodzinski, who has been researching and teaching at the University of Kassel since 2000, earned her doctorate in Frankfurt \u2013 meaning she received her didactical introduction here. Is Frankfurt particularly strong in the didactics of physics?<\/strong><\/p>\n\n\n\n<p>I wouldn\u2019t like to pass judgement on our work right now. But maybe the candidate fits in with what I said before. Starting in the 1970s, and well into the 1980s and 1990s, Frankfurt took the lead in investigating children\u2019s preconceptions and using them as a basis for developing new teaching concepts. People know about the concept for mechanics, for example, on which Ms. Wodzinski wrote her doctorate in the 1990s. This concept has now been introduced as mandatory in some German states \u2013 illustrating just how long it can take for something to reach the classrooms \u2013 30 years in this case.<\/p>\n\n\n\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p><strong>Looking forward to the next few years \u2013 what new lesson concepts come to mind?<\/strong><\/p>\n\n\n\n<p>We never run out of topics \u2013 climate change is a current one. The University of Innsbruck has just developed a concept for teaching \u201cgreenhouse effects.\u201d One of my doctoral students will now examine the concept empirically in a school setting. We are hopeful that it won\u2019t take thirty years this time for the concept to arrive in the classroom.<\/p>","protected":false},"excerpt":{"rendered":"<p>Thomas Wilhelm, who has won several awards for his approach to teaching physics, explains why physics lessons sometimes aren\u2019t very successful, and how we can improve them \u2013 using computer 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