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  3. Good school science education is expensive. It requires specialist teachers, laboratories, equipment, technicians and consumable

Good school science education is expensive. It requires specialist teachers, laboratories, equipment, technicians and consumable

admin2009-06-24  93
问题     Good school science education is expensive. It requires specialist teachers, laboratories, equipment, technicians and consumables. Many countries have made a substantial investment in school science, yet there is growing evidence that by the time students get to the age 15, most of them have been turned off science.
    The most striking findings come from an ongoing international study whose results show that the higher a country’s ranking according to the U.N. index of human development, the less. interested its 15-year-old are in school science.
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    In countries such as Bangladesh, Ghana and Uganda, which score low on human development, 15-year-olds are very positive about wanting to continue to study science—perhaps because of the benefits that they think science can bring—whereas in Japan and western Europe they are not.
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    A number of researchers have found that the ii-year-olds arriving at secondary school are keen to study science, and enthusiastic about the prospect of practical work in exciting laboratories. Some maintain this interest over the next five years, but sadly the majority find science lessons boring and irrelevant compared with other subjects.
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    There are various ways to address the problem. Some countries have changed their school science curriculum, often making it more context-based. The teacher starts with an issue that is of interest to students and uses that as a pathway into the science one needs to understand in order to deal with such questions.
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    This growth reflects a deeper point about the nature and purposes of school science laboratories. We can think of them as providing stripped-down versions of reality, where care has been taken to simplify things to help reveal the underlying science.
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    Finally, we need to reflect on how we assess learning in science. Too often what teachers teach and, therefore, what students learn is driven by how the students are assessed It is easier for exams to test factual knowledge than some of the skills we want the next generations of scientists to develop. Governments need the confidence to develop assessment regimes that reward what we really want students to learn and science teachers to teach.

A. In real life it’s not easy to show 11-year-olds the relationship between voltage and current, between evaporation and condensation or between oxygen concentrations and rates of respiration. There are the sort of things school science labs are good for. But we need out-of-the-classroom experiences too, to help children relate such abstract activities to real-life issues.
B. By the standards of educational research, the relationship is startlingly tight one. The correlation between a country’s index of development and the stated wish of its 15-year-olds to become a scientist is 0.93—almost a perfect linear relationship.
C. Researches found it particularly intriguing that 15-year-olds in developing countries remain high interests in continuing to study science partly because they unrealistically pin their future on this career. So their motivation is rather pragmatic.
D. Teenagers criticize school science in particular for not enabling genuine discussion and debate, for not tackling up-to-date issues, and for giving them little choice—for example, about what practical work to undertake, Though they are generally think science is important, most feel that a career in it is not for them but for others who are cleverer than they are.
E. In many well-off countries, the number of students wanting to go on to higher education to study chemistry and physics—though not biology—has fallen over the past decade. In the UK this lack of enthusiasm for physical sciences has led to the closure of some 80 university science departments in the past six years. So why is school science, especially chemistry and physics, so unpopular in wealthier countries, and what can we do about it?
F. Another tack is to encourage out-of-the-school learning. Last week, for example, London’s Science Museum reopened its well-known Launchpad gallery. What is particularly notable is the care the Science Museum has taken to ensure that the exhibits support the physics that 8 to 14-year-olds will learn in schools as part of the national curriculum. There has been an explosion in the number of science museums and centres around the world, making such visits possible for an increasing number of children.

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