![]() An effective teacher may additionally do a demonstration to either introduce the topic, model the procedure, or check understanding afterwards. The teacher can demonstrate how equipment is to be used or follow up a class practical by consolidating certain teaching points.įlame tests for metal ions are commonly used as a classroom practical.The teacher wants to move past the cognitive challenge of manipulating the equipment and focus on the underlying concepts.It is often easier to integrate this with the practical procedure during a demonstration than whilst students are doing an experiment themselves. Questions can be incorporated into the activity to challenge students and extend their thinking.If there is insufficient equipment for students to work individually or in small groups, a demonstration can be a good solution. Some experiments are engaging and informative but too dangerous or complex for students to do themselves. ![]() Why choose a demonstration over a class practical activity? There are many reasons why this might be so. A skilfully selected and well-run demonstration can have a strong impact, especially if the intended learning is something other than proficiency in manipulating equipment. We shouldn’t assume that students doing practical work in small groups, or as individuals, is automatically the best way of achieving these outcomes. These are all great aims the challenge for teachers is to identify and deploy activities in lessons to ensure progress. Develop their understanding of the scientific approach to enquiry”.Learn how to use a piece of scientific equipment or follow a standard practical procedure.Develop their knowledge and understanding of the natural world.“… practical activities can be divided into three broad groups that help students In Analysing Practical Science Activities to Assess and Improve their Effectiveness, Millar argues that Practical work has an iconic role in science education, but is it necessarily the case that putting equipment in the hands of students results in more effective learning? It is important to identify what the intended learning is to decide on the best teaching strategy. Don’t try this at school: demonstrations with fire should be done behind a safety screen. Explore how demonstrations can enhance STEM teaching and learn how to make the most of them. ![]() Thank you.Seeing is believing: although hands-on practical work is incredibly important, the value of an engaging demonstration should not be overlooked. ![]() I am hopeful that today’s discussion will shed some light on the various benefits, challenges and risks that we must address before adopting a long-term nuclear recycling strategy.Īgain, I would like to thank the witnesses for their participation today and I look forward to your testimony. While reprocessing of spent fuel allows us to extract more energy from the given supply of natural uranium, it raises concerns about increased costs for waste management and the proliferation of weapons-grade materials. I am also aware of ongoing research in more advanced technologies that could address the nuclear fuel cycle issues we face today. There are near-term technologies available for reprocessing spent nuclear fuel that could be deployed in the United States relatively quickly, but there are some well-documented concerns raised about this strategy. To me, the best reason to consider reprocessing is that an expansion of nuclear power may make the once-through fuel cycle inadequate for maintaining our nuclear power supply as uranium resources eventually become scarce. I am supportive of nuclear power, as I believe it is part of the solution to the daunting challenge of climate change, and I also recognize that our 104 operating reactors provide very reliable baseload power. I would like to welcome our expert panelists who will discuss the ongoing RD&D activities in the federal government, private sector and around the globe, and help us understand the safety, environmental, security and economic issues related to the adoption of a nuclear reprocessing strategy. Good morning and welcome to today’s hearing to explore the policy questions and the research, development and demonstration needs associated with recycling our spent nuclear fuel. Opening Statement By Chairman Bart Gordon ![]()
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