What is PBL? Project Based Learning is a teaching method in which students gain knowledge and skills by working for an extended period of time to investigate and respond to an engaging and complex question, problem, or challenge. In Gold Standard PBL, Essential Project Design Elements include: Key Knowledge, Understanding, and Success Skills - The project is focused on student learning goals, including standards-based content and skills such as critical thinking/problem solving, collaboration, and self-management.
News Photos - News Pictures - Photo Essays Salvation Mountain by Aaron Huey Friday, Feb. 14, 2014 Folk artist Leonard Knight, creator of Salvation Mountain, died on Monday afternoon in San Diego. Modern Money Mechanics Modern Money Mechanics From Wikisource Jump to: navigation, search Modern Money Mechanics A Workbook on Bank Reserves and Deposit Expansion
A Private Universe Project What causes the phases of the Moon? What are the reasons for the seasons? If you ask any number of people questions like these, almost every one of them will have some ideas that make sense to them. But how do people get their ideas? Are their ideas scientifically accurate? And if not, how could you help them understand a more scientific view?
Six myths about vaccination – and why they’re wrong (ScienceAlert) A pear has 600 times more formaldehyde in it than a vaccine does, writes Rachael Dunlop. Image: Oksana Kuzmina/Shutterstock Recently released government figures show levels of childhood vaccination have fallen to dangerously low levels in some areas of Australia, resulting in some corners of the media claiming re-ignition of “the vaccine debate”. You can check how your postcode rates here. Well, scientifically, there’s no debate. In combination with clean water and sanitation, vaccines are one of the most effective public health measures ever introduced, saving millions of lives every year.
The first wide-spectrum optical invisibility cloak - metamaterials To make a Harry Potter-style invisibility cloak requires the use of materials that have what's known as a negative refractive index over all optical wavelengths, from red to violet. However, the artificially-structured optical materials from which cloaks are made thus far have been restricted to a very narrow range of optical wavelengths, limiting their ability to cloak over a range of colors. That obstacle to progress looks to be at an end, as a group of optical engineers at Stanford has succeeded in designing a broadband metamaterial that exhibits a negative refractive index over nearly the entire rainbow. View all The first invisibility cloaks, made at Duke University, worked by bending light around an object to be cloaked, as illustrated below.
How to Walk on Eggs: Fun Physics for Kids Do you ever feel like your kids are “walking on eggshells”? Now you can show your kids how to literally walk on raw eggshells and do something that seems impossible. That’s right, eggs—those delicate things you have to check at the supermarket to make sure they’re not broken. In this article, I’ll show you a fun way to find out whether eggs are truly fragile or are actually incredibly architected pieces of nature, built for both strength and weakness. Why Take the Eggshells Challenge? In our house, we aren’t concerned about walking on eggshells or treading lightly around sensitive topics.
Did You Know? – 20 Ways of Reusing Silica Gel Packets This annoying little packet has a multitude of household uses. Silica gel is a desiccant, a substance that absorbs moisture. Despite its misleading name, the silicate is actually a very porous mineral with a natural attraction to water molecules.