Le blog de Melle Henry Kids From Topical Search Wiki K-12 Education Main Page Search Engines:Free of Charge/Education/K-12 Family Friendly Search Engines KidsHealth – A health portal for for parents, for kids, for teens, and for educators. Custom Built Search Engines More Search Engines Specialized Directories External Links Phil Bradley, Children's search engines: searching the internet safely. References ↑ "About Yippy:Privacy,", Yippy, accessed Dec 28, 13, "About Yippy:Censorship,", Yippy, accessed Dec 28, 13, "About SweetSearch4me", SweetSearch4me, accessed Dec 15, 13, ActiveHistory Nanotechnologies : une boîte faite de molécules d'ADN ! Elle mesure une trentaine de nanomètres de côté. Elle s'ouvre et se ferme à l'aide d'une serrure, comme un minuscule coffre. Cette boîte qui n'est faite que de brins d'ADN, réalisée au Danemark, pourrait transporter des médicaments, servir de porte logique pour la prochaine génération d'électroniciens ou encore devenir une nouvelle famille de capteurs miniatures. Depuis plusieurs années, Jørgen Kjems, Kurt Gothelf et leurs collègues du Centre for DNADNA Nanotechnology (CDNA), à l'université Aarhus, au Danemark, s'amusent à réaliser des structures les plus petites possible à l'aide moléculesmolécules d'ADNADN. Ces longues molécules s'associent par paires et se prêtent merveilleusement à des opérations d'auto-assemblages. Des brins d'ADN composés de séquences bien choisies de bases (les unités élémentaires de l'ADN) peuvent effectivement, en théorie, s'assembler spontanément selon un schéma prévu à l'avance. Le résultat est ce cube à six faces, dont le côté mesure environ 30 nanomètres.
ICDL - International Children's Digital Library 40 Maps That Will Help You Make Sense of the World If you’re a visual learner like myself, then you know maps, charts and infographics can really help bring data and information to life. Maps can make a point resonate with readers and this collection aims to do just that. Hopefully some of these maps will surprise you and you’ll learn something new. A few are important to know, some interpret and display data in a beautiful or creative way, and a few may even make you chuckle or shake your head. If you enjoy this collection of maps, the Sifter highly recommends the r/MapPorn sub reddit. You should also check out ChartsBin.com. 1. 2. 3. 4. Pangea was a supercontinent that existed during the late Paleozoic and early Mesozoic eras, forming about 300 million years ago. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. 21. 22. 23. 24. 25. 26. 27. 28. 29. 30. 31. 32. 33. 34. 35. 37. 38. 39. 40. *Bonus* World Map Tattoo with Countries Visited Coloured Hopefully some of these maps will surprise you and you’ll learn something new. 1. 2.
Mutation, Mutagens, and DNA Repair Copyright 1998 by Beth A. Montelone, Ph. D., Division of Biology, Kansas State University; originally written as a supplement to BIOL400, Human Genetics. I. Introduction: Definitions and mutation rates We have been using the term 'mutation' pretty loosely up to this point in the course...now we need to define it more precisely: mutation-- a change in the genetic material (ie. Why this focus? Let's further define mutation as a heritable change in the genetic material. In detection of germline mutations in humans and measurement of human mutation rates we have the problem of diploidy. This rate is roughly in the middle of the range reported for various human genes: those with high mutation rates like NF1 (neurofibromatosis type 1) and DMD (Duchenne muscular dystrophy) (ca. 1 x 10e-4) and those with low rates of new mutation like the Huntington's Disease gene (1 x 10e-6). Why might this be? II. A. B. III. A. B. C. Deamination of methylcytosine to thymine can also occur. D. IV. A. 1. 2. 3.
Kids Search Engines EDITOR'S NOTE: For an updated look at search engines for children, see "Savvy Little Searchers: Kids' Search Engines" The services below are designed primarily to serve the needs of children, either in focus, or by filtering out sites that some parents and teachers might find inappropriate for kids. These usually include sites that deal with explicit sexual matters, porn sites, violence, hate speech, gambling and drug use. Scroll down for listings or jump directly to: Major Children's Guides - Filtering Options Other Children's Search Engines - Filtering and Blocking SoftwareRelated Articles Major Children's Guides & Directories The kid-safe directories below use human beings to filter out sites that might be considered objectionable for viewing by children. Ask Jeeves For Kids Ask Jeeves is a unique service where you enter a question, and Ask Jeeves tries to point you to the right web page that provides an answer. KidsClick! Yahooligans
12 Maps That Changed the World - Uri Friedman "All cultures have always believed that the map they valorize is real and true and objective and transparent," Brotton, a professor of Renaissance studies at Queen Mary University of London, told me. "All maps are always subjective.... Even today’s online geospatial applications on all your mobile devices and tablets, be they produced by Google or Apple or whoever, are still to some extent subjective maps." There are, in other words, no perfect maps—just maps that (more-or-less) perfectly capture our understanding of the world at discrete moments in time. 1. Humans have been sketching maps for millennia, but Claudius Ptolemy was the first to use math and geometry to develop a manual for how to map the planet using a rectangle and intersecting lines—one that resurfaced in 13th-century Byzantium and was used until the early 17th century. 2. 3. This map from England's Hereford Cathedral depicts "what the world looked like to medieval Christians," Brotton says. 4. 5. 6. 7. 8. 9. 10. 11.
Bio-Tremplins : la biologie vit et évolue. L'enseignement aussi Children's search engines; 13 reviewed and assessed Introduction When searching the internet - particularly with children in mind, it's important to ensure that you can feel safe with what they are doing, and where they are going. There are a fair number of child friendly search engines available - at least, that's what they call themselves, so I decided to take a look at them to see what I thought of them. I wanted to get through a lot fairly quickly, so these are just my personal impressions, and I would strongly advise you to check through them yourselves to see if you think that they are appropriate (or not) for your own children. I choose a few terms that I was keen on trying out - ‘dogging’ which is a British term (I believe) for a certain type of sexual practice that generally takes place in car parks, blue tits - for obvious reasons, and schoolgirl - again for obvious reasons. I could have chosen a lot of other terms of course, but I think that these three are enough to point of the extent to which a child can surf safely. Yahoo!
Questioning Toolkit Essential Questions These are questions which touch our hearts and souls. They are central to our lives. Most important thought during our lives will center on such essential questions. What does it mean to be a good friend? If we were to draw a cluster diagram of the Questioning Toolkit, Essential Questions would be at the center of all the other types of questions. All the other questions and questioning skills serve the purpose of "casting light upon" or illuminating Essential Questions. Most Essential Questions are interdisciplinary in nature. Essential Questions probe the deepest issues confronting us . . . complex and baffling matters which elude simple answers: Life - Death - Marriage - Identity - Purpose - Betrayal - Honor - Integrity - Courage - Temptation - Faith - Leadership - Addiction - Invention - Inspiration. The greatest novels, the greatest plays, the greatest songs and the greatest paintings all explore Essential Questions in some manner. Why do we have to fight wars?