Claim Evidence Reasoning By far, the biggest shift in my teaching from year 1 to year 7 has been how much emphasis I now place on evaluating evidence and making evidence-based claims. I blame inquiry. Not inquiry in the generalized, overloaded, science teaching approach sense. Just the word. "Inquiry." Even now, when I hear the word "inquiry" I still think mainly of asking questions and designing experiments. We were very busy and very engaged and learned very little. There are a few structures I've been using to help shift the focus on the class to analysis and argument. Claim-Evidence-Reasoning (pdf and pdf) is a framework for writing scientific explanations. As part of their lab handout they get a prompt that looks like this: As the year goes on I remove most of the scaffolds until ultimately the students just get a prompt or question. I've been happy with it. I like frameworks a lot. The key to implementation is that the structure of the class really has to be designed around C-E-R.
Genetically-modified purple tomatoes heading for shops 24 January 2014Last updated at 17:00 ET By David Shukman Science editor, BBC News The new tomatoes could improve the nutritional value of everyday foods The prospect of genetically modified purple tomatoes reaching the shelves has come a step closer. Their dark pigment is intended to give tomatoes the same potential health benefits as fruit such as blueberries. Developed in Britain, large-scale production is now under way in Canada with the first 1,200 litres of purple tomato juice ready for shipping. The pigment, known as anthocyanin, is an antioxidant which studies on animals show could help fight cancer. Scientists say the new tomatoes could improve the nutritional value of everything from ketchup to pizza topping. The tomatoes were developed at the John Innes Centre in Norwich where Prof Cathie Martin hopes the first delivery of large quantities of juice will allow researchers to investigate its potential. Continue reading the main story “Start Quote Legacy of distrust
Blackett Family Pedigree Create a Blackett Family Pedigree Blackett Family Members The Blackett Family DNA Activity is largely a genetic study of the inheritance of alleles in an extended family. Bob Blackett has tested DNA samples from himself and 13 other relatives. Would you like to check your answer? We have prepared a sample pedigree chart of the Blackett family that you can use to check your answer, or to skip this activity if time is limiting. View the Pedigree in a new web page Download the pdf version. Introduction : Overview | STR P | CODIS | Analysis | Inheritance | Frequency Calc. Activities : Pedigree | Collect data | Paternity testing | Missing person | RCMP freq. calc. The Biology Project University of Arizona October 27, 2000 firstname.lastname@example.org All contents copyright © 1996-2000.
Antibiotic Overuse May Increase Superbug Evolution Rate Multiple drug-resistant Staphylococcus aureus bacteria seen under an electron microscope. Photo: CDC By flooding our environment with antibiotics, people may alter a little-appreciated but profound aspect of bacterial evolution: the very pace at which it occurs. Bacteria may evolve more rapidly and more radically than just a few decades ago. This proposition is still a hypothesis, but it’s an intriguing one. “Human activities might be altering the fundamental tempo of bacterial evolution,” write geneticists Michael Gillings of Australia’s Macquarie University and Hatch Stokes of the University of Technology in a June Trends in Ecology and Evolution paper. Gillings and Stokes start by describing what’s widely known: The world is inundated by antibiotics. 'Baseline bacterial evolution is a bell-shaped curve, and we are pushing that curve.' That much is obvious. “Rates of evolution are themselves selected for higher evolvability,” said Gillings. Not everyone is convinced.
Scientific Writing Scaffolds As a department we've been working on different writing scaffolds. We use Constructing Meaning as a school which I think is mostly good. We've tried all kinds of different writing frames with varying degrees of success. Most of these come from Constructing Meaning. This was one of our first attempts. It was our sixth graders' first or second try at extended science writing. We pulled two main lessons from this. 1. 2. Next attempts: This is just the first page but the back is similar. Below is an even more generalized example. We go back and forth about word banks. Most recently we gave all of our sixth graders a prompt from the textbook about whether or not the government should provide flood insurance. On my end, all they got was a graphic organizer. I put the claim at the bottom because I wanted them to go through each argument first before deciding on a claim. Their claims I limited to "The government should/should not provide flood insurance." I was very happy with the results here.
Cells from eyes of dead 'may give sight to blind' 31 January 2014Last updated at 22:36 ET By James Gallagher Health and science reporter, BBC News The necessary cells can be found in the back of everyone's eyes Cells taken from the donated eyes of dead people may be able to give sight to the blind, researchers suggest. Tests in rats, reported in Stem Cells Translational Medicine, showed the human cells could restore some vision to completely blind rats. The team at University College London said similar results in humans would improve quality of life, but would not give enough vision to read. Human trials should begin within three years. Donated corneas are already used to improve some people's sight, but the team at the Institute for Ophthalmology, at UCL, extracted a special kind of cell from the back of the eye. These Muller glia cells are a type of adult stem cell capable of transforming into the specialised cells in the back of the eye and may be useful for treating a wide range of sight disorders. Continue reading the main story
Double Blasted In early August of 1945, Tsutomu Yamaguchi had a run of the worst luck imaginable. A double blast of radiation left his future, and the future of his descendants, in doubt. In this short: an utterly amazing survival story that spans ... well, 4 billion years when you get down to it. On the morning of August 6th, 1945, Tsutomu Yamaguchi was in Hiroshima on a work trip. He was walking to the office when the first atomic bomb was dropped about a mile away.
Free Graphic Organizers for Teaching Writing Introduction As you know, free graphic organizers are readily available on the Internet. However, access to quality organizers often requires either a monthly or an annual fee. Here you will find, what I think, are quality organizers WITHOUT monthly or annual fees. I dug into my own archives that I've accumulated over my 33 year career in search of organizers that focus on writing. With that in mind, I searched thoroughly for graphic organizer ideas wherever I could find them. The result is what you will see on this page--a collection of 50 graphic organizers designed specifically for teaching writing. Quick Links for THIS Page You may use the following quick links to go directly to what interests you on this page. Webs for Preparing to Write Flow Charts for SequencingPersuasive and Expository Essay MapsConcept WheelsOrganizers for Journalism StudentsPoetry FramesAdditional WebsCustomizable Graphic OrganizersFree DownloadConclusion Webs for Preparing to Write Return to Top of Page Poetry Frames
Designing Science Inquiry: Claim + Evidence + Reasoning = Explanation In an interview with students, MIT's Kerry Emmanuel stated, "At the end of the day, it's just raw curiosity. I think almost everybody that gets seriously into science is driven by curiosity." Curiosity -- the desire to explain how the world works -- drives the questions we ask and the investigations we conduct. Let's say that we are planning a unit on matter. Is air matter? Next, we can ask our students what data they need to answer the question, and how they can collect that data -- how they can investigate. According to the CER model, an explanation consists of: A claim that answers the question Evidence from students' data Reasoning that involves a "rule" or scientific principle that describes why the evidence supports the claim Your students might suggest the following explanation: Air is matter (claim). The explanation could be made more complete by including evidence and reasoning related to air taking up space. Introducing CER to your Students Let the Inquiry Begin