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taconi12

Fractions and Percentages (MEP - GCSE - Unit 11) - Resources - TES - 4 views

www.tes.co.uk/...addtofavourite

fraction percentage math lessonplans

shared by taconi12 on 14 Feb 12 - No Cached
  • taconi12 on 14 Feb 12
     
    The topic of Fractions and Percentages from the GCSE books of the Mathematics Enhancement Program. For information about these resources and an index for the whole collection please visit http://www.mrbartonmaths.com/CIMT.htm Keywords: Fraction, Add, Subtract, Multiply, Divide, Numerator, Denominator, Percentage, Convert, Equivalent, VAT, Increase, Decrease, Reverse, Context, Compound, Interest, Exponential, Growth, Depreciation.
Martin Burrett

http://www.st-andrews23.lancsngfl.ac.uk/download/494/Area.swf - 25 views

www.st-andrews23.lancsngfl.ac.uk/...Area.swf

maths area flash

shared by Martin Burrett on 26 Aug 13 - No Cached
  • Martin Burrett on 26 Aug 13
     
    A great resource for learning about the area of 2D shapes, including rectangles, triangles and compound shapes. http://ictmagic.wikispaces.com/Maths
Marsha Ratzel

Education World ® : Curriculum: You've Got E-Mail -- But Can You Make It Real... - 1 views

education-world.com/...curr165.shtml

shared by Marsha Ratzel on 28 Jul 09 - Cached
  • "Before you begin a telecollaborative project," she said, "Look at the plan critically and decide whether it's worth it in terms of learning outcomes. Ask yourself these questions: Does this use of the Internet allow students to do something that can't be done in another way? Does this use of the Internet allow students to do something in a better way? "If the answer to either of those questions is yes," said Harris, "then your project is probably worth doing." "As teachers, we need to do what is our art and our craft -- which is teaching, not technology."
    • Marsha Ratzel
      Marsha Ratzel on 30 Jul 09
       
      Judi Harris has been this champion for years...she long ago convinced me that you shouldn't use tech just for the sake of using tech. Her statements gives the compelling questions we should all ask ourselves before embarking on the use of precious time. What's your return on investment????
  • An activity structure, according to Harris, is simply a description of what students do in an activity, without reference to content or grade level. For example, kindergarten students mixing paints, elementary students forming compound words, and high-school students creating chemical compounds are all using an activity structure that involves combining existing elements to form new elements. The content and grade level are strikingly different, but the basic activity, the structure of the activity, is the same. Existing activity structures, said Harris, are usually supported best by existing instructional tools. If Internet tools are going to be used to enable students to do something they haven't been able to do, or do as well, before, new activity structures, structures that are best supported by new instructional tools, must be identified and implemented.
  • Develop a project plan that's specific and logistically manageable.
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  • Establish a clear schedule, set interim deadlines, and send out reminders as deadlines approach
  • Be sure students have regular access to computers. Once a week in a computer lab is not enough time. For students to get the most out of a telecomputing project, they must be able to participate at least two or three times a week.
  • Focus on the use of the tools, not on the tools
  • Catherine Curtis on 28 Jul 09
     
    How to use email in the classroom
  • Michèle Drechsler on 06 Aug 09
     
    It is truth
Holly Barlaam

Virtual Microscope - 117 views

www.udel.edu/...scope.html

microscope microscopy biology life science

shared by Holly Barlaam on 28 May 11 - Cached
  • Holly Barlaam on 28 May 11
     
    An animation that teaches students how to use a compound light microscope. Includes slide samples like the basic letter "e", teaches how to adjust the ocular, the objectives, how to use coarse and fine adjustment, and so on. Really precursor to doing the real thing in class.
Cara Whitehead

SpellingCity for iPhone, iPad, and iPod touch on the iTunes App Store - 31 views

itunes.apple.com/...id538407602

free ipad iphone ipod touch ipod itunes app vocabulary spelling spellingcity vocabularyspellingcity

shared by Cara Whitehead on 15 Sep 13 - No Cached
  • Cara Whitehead on 15 Sep 13
     
    VocabularySpellingCity is a fun way to learn spelling and vocabulary words by playing engaging learning games using any word list. The most popular activities are Spelling TestMe, HangMouse, and our vocabulary games, available to Premium Members. The most popular word lists are Sound Alikes, Compound Words, Hunger Games and SAT Words. This is a free app!
Jeremy Brueck

Reed-Kellogg Diagrammer - 47 views

1aiway.com/...enparser

grammar sentence diagram ELA writing visulization

shared by Jeremy Brueck on 10 Jul 12 - No Cached
  • Charlotte Ballard on 11 Jul 12
     
    I tried a variety of sentences with this tool, and did not find it to be very helpful. It does not allow for a long sentence, and it repeatedly told me "Could not find utterance" when I created a compound-complex sentence.
Jac Londe

Startup turns carbon dioxide into fuels - 1 views

phys.org/...rtup-carbon-dioxide-fuels.html

co2 dioxyde carbon carbon dioxide fuels science

shared by Jac Londe on 18 Jun 12 - No Cached
  • Today, carbon dioxide (CO2) is a hot topic. Scientists around the globe are searching for ways to store, dispose of, or prevent the formation of the greenhouse gas, which is a major driver of global climate change. Liquid Light hopes to take this concept one step further and harness waste CO2 as a source of carbon to make industrial chemicals and fuels.
  • Take CO2 and mix it in a water-filled chamber with an electrode and a catalyst. The ensuing chemical reaction converts CO2 into a new molecule, methanol, which can be used as a fuel, an industrial solvent or a starting material for the manufacture of other chemicals.
  • Bocarsly likes to call the process "reverse combustion" because it is like running a burning reaction backwards. Instead of burning fuel and oxygen to produce CO2, the CO2 converts back into fuel and oxygen.
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  • Cole set up a flask containing a solution of CO2 and a pyridinium catalyst dissolved in water. In place of sunlight, which emits a broad spectrum of wavelengths of light, she shined on the flask a blue light-emitting diode (LED) because it gives off certain wavelengths that are highly efficient at driving the reaction. In the flask she placed an electrode that is activated by particles of light, or photons. "We used a semiconductor electrode that would allow us to substitute light for electricity," said Cole.
  • The Princeton scientists did some additional studies, and made a surprising discovery: They could turn CO2, which contains only one carbon, into a compound with a carbon-carbon bond, which vastly increases the possibilities for creating commercial applications.
Kenuvis Romero

Psilocybin (magic mushrooms) - 0 views

flipper.diff.org/...4384

shared by Kenuvis Romero on 23 Jun 13 - No Cached
  • The biosinthetic path that allow Psilocybin to be produced by mushrooms is as follow:
  • The several analogyes with triptophan aminoacid, with whom psilocybin has common origines are probably at the base of psilocybin ability to induced psychedelich alteration on humans.
  • Amino acids, including tryptophan, act as building blocks in protein biosynthesis. In addition, tryptophan functions as a biochemical precursor for many compounds like serotonin Serotonin (a neurotransmitter), synthesized via tryptophan hydroxylase. Serotonin, in turn, can be converted to melatonin (a neurohormone), via N-acetyltransferase and 5-hydroxyindole-O-methyltransferase activities
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  • it's been noticed that psilocyn can indirectly raise dopamine concentration withing the basal ganglia.
  • Almost 50% of oral psilocybin is absorbed by stomach and gut; from here is lead to liver, where it's converted in psilocin, pharmacologically active form, that can furtherly be glucoronated and escreted with urine or converted in other psilocinics metabolites.
  • In rats, the median lethal dose (LD50) when administered orally is 280 milligrams per kilogram (mg/kg), approximately one and a half times that of caffeine. When administered intravenously in rabbits, psilocybin's LD50 is approximately 12.5 mg/kg
  • traces of the compund can be detected in unine even after 7 days.
  • Clinical studies show that psilocin concentrations in the plasma of adults average about 8 µg/liter within 2 hours after ingestion of a single 15 mg oral psilocybin dose; psychological effects occur with a blood plasma concentration of 4–6 µg/liter. Psilocybin is about 100 times less potent than LSD on a weight per weight basis, and the physiological effects last about half as long.
  • Within 24 hours from administration 65% of the alucinogen is escreted by urine, while another 15-20% is excreted by bile and feces.
  • Monoamine oxidase inhibitors (MAOI) have been known to prolong and enhance the effects of psilocybin. Alcohol consumption may enhance the effects of psilocybin, because acetaldehyde, one of the primary breakdown metabolites of consumed alcohol, reacts with biogenic amines present in the body to produce MAOIs related to tetrahydroisoquinoline and β-carboline. Tobacco smokers can also experience more powerful effects with psilocybin, because tobacco smoke exposure decreases levels of MAO in the brain and peripheral organs.
  • This could lead to a lower usage o f glucose, but the same study admitted an increase glucose usage by the whole brain cell, meaning a differente use of this sugar while the drug is having effects.
  • use of MRI (functional magnetic resounance) showed that the decresed blood flow associate with decreasing in neural activity. A simple explanation for this unexpected situation could be the serotoning agonist action of psilocybin, action that seems to be focused more on 5-HT receptors than on 5-HT2A.
  • psilocibyn is able to act as a 5-HT agonist binding directly its receptors.
  • augmented glucose consumption in several brain regions; this lead to the conclusion that psilocybin is some way able to modify the physiological glucosal metabolic rate of our body
  • The strong inibition of the PCC is now thought to be most significant action of psilocybin on neural disaccoppiation
    • Kenuvis Romero
      Kenuvis Romero on 23 Jun 13
       
      Lower brain glucose metabolism is linked with increased capacity for working memory.
  • Psilocybin comprises approximately 1% of the weight of Psilocybe cubensis mushrooms, and so nearly 1.7 kilograms (3.7 lb) of dried mushrooms, or 17 kilograms (37 lb) of fresh mushrooms, would be required for a 60-kilogram (130 lb) person to reach the 280 mg/kg LD50 value.
  • psilocybin can cause anxiety and increased heart rate and BP which is very counter- productive for someone on metoprolol and micardis.
  • propose the possibility to use psilocybin as a palliative therapy for terminal illness like cancer but also as a real antidepressive active principle available for the family of the patient. The rational is foundable in the fact that we usually administer SSRI as antidepressive agents, so psilocibyn sholud be useful in this purpose for its selective agonist action on 5-HT2A receptors
Kenuvis Romero

Journal of Cerebral Blood Flow & Metabolism - Multiple Microvascular and Astroglial 5-H... - 0 views

www.nature.com/...9590586a.html

shared by Kenuvis Romero on 23 Jun 13 - No Cached
  • Physiologic and anatomic evidence suggest that 5-hydroxytryptamine (5-HT) neurons regulate local cerebral blood flow and blood-brain barrier permeability.
  • capillary endothelial cells exhibited mRNA for the h5-HT1D and for the 5-HT7 receptors whereas microvascular smooth muscle cells, in addition to h5-HT1D and 5-HT7, also showed polymerase chain reaction products for h5-HT1B receptors. Expression of 5-HT1F and 5-HT2A receptor mRNAs was never detected in any of the microvascular cell cultures. In contrast, messages for all 5-HT receptors tested were detected in human brain astrocytes with a predominance of the 5-HT2A and 5-HT7 subtypes. In all cultures, sumatriptan inhibited (35–58%, P < .05) the forskolin-stimulated production of cyclic AMP, an effect blocked by the 5-HT1B/1D receptor antagonists GR127935 and GR55562. In contrast, 5-carboxamidotryptamine induced strong increases (≥ 400%, P < .005) in basal cyclic AMP levels that were abolished by mesulergine, a nonselective 5-HT7 receptor antagonist. Only astroglial cells showed a ketanserin-sensitive increase (177%, P < .05) in IP3 formation when exposed to 5-HT. These results show that specific populations of functional 5-HT receptors are differentially distributed within the various cellular compartments of the human cortical microvascular bed, and that human brain astroglial cells are endowed with multiple 5-HT receptors. These findings emphasize the complex interactions between brain serotonergic pathways and non-neuronal cells within the CNS and, further, they raise the possibility that some of these receptors may be activated by antimigraine compounds such as brain penetrant triptan derivatives.
Kenuvis Romero

Memory - Wikipedia, the free encyclopedia - 0 views

en.wikipedia.org/Memory

shared by Kenuvis Romero on 23 Jun 13 - No Cached
  • Encoding of working memory involves the spiking of individual neurons induced by sensory input, which persists even after the sensory input disappears (Jensen and Lisman 2005; Fransen et al. 2002). Encoding of episodic memory involves persistent changes in molecular structures that alter synaptic transmission between neurons. Examples of such structural changes include long-term potentiation (LTP) or spike-timing-dependent plasticity (STDP). The persistent spiking in working memory can enhance the synaptic and cellular changes in the encoding of episodic memory (Jensen and Lisman 2005).
  • Recent functional imaging studies detected working memory signals in both medial temporal lobe (MTL), a brain area strongly associated with long-term memory, and prefrontal cortex (Ranganath et al. 2005), suggesting a strong relationship between working memory and long-term memory. However, the substantially more working memory signals seen in the prefrontal lobe suggest that this area play a more important role in working memory than MTL (Suzuki 2007).
  • Consolidation and reconsolidation. Short-term memory (STM) is temporary and subject to disruption, while long-term memory (LTM), once consolidated, is persistent and stable. Consolidation of STM into LTM at the molecular level presumably involves two processes: synaptic consolidation and system consolidation. The former involves a protein synthesis process in the medial temporal lobe (MTL), whereas the latter transforms the MTL-dependent memory into an MTL-independent memory over months to years (Ledoux 2007). In recent years, such traditional consolidation dogma has been re-evaluated as a result of the studies on reconsolidation. These studies showed that prevention after retrieval affects subsequent retrieval of the memory (Sara 2000). New studies have shown that post-retrieval treatment with protein synthesis inhibitors and many other compounds can lead to an amnestic state (Nadel et al. 2000b; Alberini 2005; Dudai 2006). These findings on reconsolidation fit with the behavioral evidence that retrieved memory is not a carbon copy of the initial experiences, and memories are updated during retrieval.
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  • Physical exercise, particularly continuous aerobic exercises such as running, cycling and swimming, has many cognitive benefits and effects on the brain. Influences on the brain include increases in neurotransmitter levels, improved oxygen and nutrient delivery, and increased neurogenesis in the hippocampus. The effects of exercise on memory have important implications for improving children's academic performance, maintaining mental abilities in old age, and the prevention and potential cure of neurological diseases.
  • At the Center for Cognitive Science at Ohio State University, researchers have found that memory accuracy of adults is hurt by the fact that they know more, and have more experience than children, and tend to apply all this knowledge when learning new information. The findings appeared in the August 2004 edition of the journal Psychological Science.
  • Interference can hamper memorization and retrieval. There is retroactive interference, when learning new information makes it harder to recall old information[59] and proactive interference, where prior learning disrupts recall of new information. Although interference can lead to forgetting, it is important to keep in mind that there are situations when old information can facilitate learning of new information. Knowing Latin, for instance, can help an individual learn a related language such as French – this phenomenon is known as positive transfer.[60]
  • Methods to optimize memorization[edit] Memorization is a method of learning that allows an individual to recall information verbatim. Rote learning is the method most often used. Methods of memorizing things have been the subject of much discussion over the years with some writers, such as Cosmos Rossellius using visual alphabets. The spacing effect shows that an individual is more likely to remember a list of items when rehearsal is spaced over an extended period of time. In contrast to this is cramming which is intensive memorization in a short period of time. Also relevant is the Zeigarnik effect which states that people remember uncompleted or interrupted tasks better than completed ones. The so-called Method of loci uses spatial memory to memorize non-spatial information.[72]
Jac Londe

Making Oil from Plastic - 34 views

www.oil-price.net/...making-oil-from-plastic.php

oil plastic science plastiques

shared by Jac Londe on 14 Oct 10 - No Cached
  • Making Oil from Plastic
  • Tons of plastic from Japan and US is left afloat in the Pacific Ocean, which is endangering marine life significantly.
  • Blest, a Japanese company has invented a safe and user friendly machine
  • ...3 more annotations...
  • The machine is effective in recycling different kinds of plastic into oil.
  • Utilization doesn't just take into account the 20 percent of recycled plastic. But it also considers the incinerated 52 percent used for energy recovery like generating electric power or heat. Akinori Ito says "If we burn the plastic, we generate toxins and a large amount of CO2. If we convert it into oil, we prohibit CO2 production and at the same time, increase people's awareness about the value of plastic garbage"
  • Oil from Shale: Oil can be extracted from this fine grained, organic rich, sedimentary rock through pyrolysis, thermal dissolution or hyderogentation. Shale contains high concentrations of organic chemical compounds known as Kerogen. From this solid mixture, oil is extracted through chemical process. Shale can be effective converted into combustible oil shale gas and liquid hydrocarbons (shale oil). Global deposits of Shale are estimated to be around 2.8 trillion to 3.3 trillion barrels of restorable oil. Planet earth is blessed with about 600 known oil shale deposits, most of which is found in United States of America. Although several countries have oil hale deposits, known deposits of economic importance is found only in 33 countries.
danthomander

Teach Less, Learn More - Have We Achieved It? | Media Coverage | Newsroom | National In... - 32 views

www.nie.edu.sg/...learn-more-have-we-achieved-it

singapore education teach

shared by danthomander on 12 Nov 14 - Cached
  • The problem is compounded by parents who expect their kids to do well in school and would resort to any help they can get, including tuition or enrichment classes for their children.
  • danthomander on 12 Nov 14
     
    Singapore's self-assessment
Dora Hawkins

Fill It In: English Spanish Vocabulary - 58 views

www.vocabulary.co.il/...-in-english-spanish-vocabulary

Games for practicing the vocabulary in English and Spanish

shared by Dora Hawkins on 25 Nov 12 - No Cached
  • Dora Hawkins on 25 Nov 12
     
    Vocabulary is Fun! Whether you're learning or teaching analogies, antonyms and synonyms, compound words, figurative language, homophones, parts of speech, root words, prefixes and suffixes or contractions to your English speakers or your ESL students, Vocabulary *is* fun! Interactive way to learn new vocabulary using technology :))))
Dwight Woodley

Spelling & Vocabulary Website: SpellingCity - 68 views

www.spellingcity.com

elementary spelling language_arts

shared by Dwight Woodley on 01 Oct 09 - Cached
  • Over 42,000 spelling words with customizable sentences and definitions A REAL person who says each word and sentence Free home pages for teachers and parents to save lists Teacher training videos Free printable handwriting worksheets Free teaching resources with lists and lesson plans Twenty-five games to play online or to print such as
  • Over
  • Over 42,000 spelling words with customizable sentences and definitions A REAL person who says each word and sentence Free home pages for teachers and parents to save lists Teacher training videos Free printable handwriting worksheets Free teaching resources with lists and lesson plans Twenty-five games to play online or to print such as :Alphabetical Order, Unscramble, Parts of Speech, HangMouse, Crossword Puzzle, WordSearch, and Vocabulary Test. A free forum and newsletters
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  • Over 42,000 spelling words with customizable sentences and definitions A REAL person who says each word and sentence Free home pages for teachers and parents to save lists Teacher training videos Free printable handwriting worksheets Free teaching resources with lists and lesson plans Twenty-five games to play online or to print such as : Alphabetical Order , Unscramble , Parts of Speech , HangMouse , Crossword Puzzle , WordSearch , and Vocabulary Test . A free forum and newsletters
  • Kimberly LaPrairie on 01 Oct 09
     
    SpellingCity.com has: - Over 42,000 spelling words and ten learning games! - A REAL person who says each word and sentence. - Free home pages for teachers and parents to save lists. - How To Videos to explain to teachers and parents how to use SpellingCity.com. - A free forum and newsletter with more vocabulary and spelling resources! - Ten spelling and vocabulary games to play online or to print. - Free printables for handwriting practice with your saved lists. - A Resources Section which highlights features and existing lists for Dolch words, compound words, sound-alikes (their, there, they're), contractions, possessives, and more. After taking the online spelling test, students can print out a report, retake the entire test, or get tested only on spelling words that they got wrong the first time. TeachMe spells and displays the word in ways that stimulate memory for visual and verbal learners. Printable Games include WordSearch, UnScramble, WhichWord?, Sentence UnScramble and MissingLetter. Printable Handwriting Worksheets for combined spelling and handwriting practice can be created from any saved list (this feature only works if the list is saved). Choices includes three sizes of lines, capitals or small letters, script or cursive, and with directional arrows on or off. How cool is that?
  • Linda Zwillick on 10 Dec 09
     
    All you have to do is type in the list of words and bam! at least 10 games are generated for the students! It also teaches and tests the students on the words. You can save the lists as a teacher and have students search for your lists or you can have students input their own lists without saving them.
  • Martin Burrett on 19 Jul 11
     
    A superb resource where teachers can sign in and input spelling lists for pupils to learn by playing games. Give pupils the link and they don't need to sign in to use it. Site only recognises US spelling when generating example sentences, but you can input your own easily. Free option should be enough for most users, but 'paid for' option is available. http://ictmagic.wikispaces.com/English
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