Kids

For Kids & Teachers | Bill Nye the Science Guy Hey kids, hey teachers! Here are the Home Demos, the experiments you should try at home sometime. We call them demonstrations (demos for short), because we hope we already know what’s going to happen. But of course, doing it for yourself is equal to being told what should happen about a thousand times. Keep clicking around and you’ll find the Episode Guides. We’ve also made it easy for anyone to select from a number of Printable One Sheets. My latest project is about math. Challenge yourself.

Teens So you got naked online? Have you sent naked or sexual pics or video to someone and now regret it? It's not the end of the world. Take control and find out more about sexting. Read more » The Cloud - Dream on Deciphering the Genetic Code: M. Nirenberg Office of NIH History Sid the Science Kid Come play again later! Come play again tomorrow! 101 VIDEO & AUDIO Home Donna Rice Hughes, president and CEO of Enough Is Enough, will be featured on the Executive Report, American Airlines’ exclusive talk radio programming. The Executive Report features interviews with CEO’s from around the globe. Award-winning producer Mark Larson interviewed EIE President Donna Rice Hughes for a 30 minute Internet Safety 101 Radio program. This spot airs in several of the top markets nationwide. Enough Is Enough℠ interviewed top clinicians, psychologists, law enforcement officers, industry representatives as well as parents, teens, victims of Internet-initiated sex crimes, a registered sex offender and others about the most compelling and relevant Internet safety topics today. About Enough Is Enough℠ Introduction: The Perfect Storm Despite the Internet's many wonderful benefits, a perfect storm has emerged for the online victimization of children. Pornography 101 Videos What is Pornography? Pornography: Access Pornography: Harms Empowering Parents Predators 101 Videos

Center for BioMolecular Modeling That's Not Cool Three Mathematical Cultures John T. Baldwin Department of Mathematics, Statistics and Computer Science University of Illinois at Chicago The title is inspired by the famous discussion of `two cultures' by C.P. By a Mathematics Educator I mean a person, usually but not exclusively holding a Ph.D. in Mathematics Education, whose primary intellectual activity is the understanding of how mathematics is learned and transmitting this understanding to others. Several subcultures are being ignored in this discussion. My own background is predominantly that of a research mathematician. During my work with the high schools I have observed that a number of misunderstandings were caused by people with different backgrounds using the same words is quite different ways or having different expectations of the normal way that things are done. Attitudes to Mathematics We analyze below some of the different views of mathematics of the different groups. Attitudes towards teaching Professional situation

Facebook for Parents Facebook is How Our Teens Connect Facebook is a huge part of many teens' lives. They use it to keep up with their friends' activities, play games, chat, post photos -- even do homework. And while public sharing always carries some safety and privacy risks (more on that below), with good judgment and strict privacy settings, Facebook can be used safely. What is Facebook? Facebook is an enormous, free social networking site with hundreds of millions of users all over the world. To use Facebook, you sign up with your email address, name, gender, date of birth, and password. As you complete your profile, you can select the people who can view each piece of information. Why it Matters Teens' willingness to share information can surprise -- and even shock -- parents who aren't used to such public disclosure. But Facebook's privacy settings have evolved since the site first started, and its users have evolved, too. How to Help Your Teen Use Facebook Safely Tips for talking to teens about Facebook

Scientific American Frontiers:The Gene Hunters:Teaching Guide:Building an Electrophoresis Chamber This activity page will offer: Assemble a gel chamber for separating mixtures Observe separation influenced by electric charge Operationally define separation through gel electrophoresis Plastic ice cube molds Aluminum foil 9 volt battery Connecting wires with alligator clips Scissors Buffer solution (as prepared by your instructor)** Medicine dropper (or fine laboratory pipette) Warm liquid agar solution *** Food coloring (various colors) {*style: *} * Prior to this activity, use a small saw to carefully separate a plastic ice cube tray into sections with 2 or 4 individual molds. ** Prepare 1 gram of baking soda in 100 ml of water *** Prepare 1.0 grams non-nutrient agar in 100 ml of water. {*style:PROCEDURE Part 1- Setting the Gel *} Clean and dry two mold chambers of an ice cube tray. Obtain the cooling agar solution as prepared by your instructor. Carefully pour this solution into each of the tray chambers. {*style:Part 2- Building the Chamber {*style:

Principle of the PCR There are three major steps in a PCR, which are repeated for 30 or 40 cycles. This is done on an automated cycler, which can heat and cool the tubes with the reaction mixture in a very short time. at 94°C : During the denaturation, the double strand melts open to single stranded DNA, all enzymatic reactions stop (for example : the extension from a previous cycle). at 54°C : The primers are jiggling around, caused by the Brownian motion. at 72°C : This is the ideal working temperature for the polymerase. The bases (complementary to the template) are coupled to the primer on the 3' side (the polymerase adds dNTP's from 5' to 3', reading the template from 3' to 5' side, bases are added complementary to the template) Figure 3 : The different steps in PCR. Animated picture of PCR Because both strands are copied during PCR, there is an increase of the number of copies of the gene. Figure 4 : The exponential amplification of the gene in PCR. There is a product formed. Only one band is formed.

Biodiesel Cons" Photo courtesy Paul RoesslerMicroalgae, organisms from which a diesel-like fuel can be derived: Cultured in the American southwestern deserts, NREL-developed microalgae may one day produce large amounts of lipids for conversion to biodiesel fuel. Of course, nothing is without penalty, and biodiesel does have its drawbacks. Some have to do with the fuel itself, and many have to do with the bigger picture. One of the problems with the fuel itself is the increase in NOx in biodiesel emissions. Another problem is biodiesel's behavior as a solvent. Also, in some engines, there can be slight decrease in fuel economy and power. The major drawbacks to biodiesel are connected to the bigger picture, namely the market and associated logistics. The other, perhaps more important issue is that of amount and availability. For information on locating biodiesel stations outside the U.S., contact your local biofuels agency. So how much do we make? Currently, the largest biodiesel market is fleet vehicles.

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