The 13 Most Important Numbers in the Universe - James D. Stein's Cosmic Numbers In the 17th century, scientists understood three phases of matter—solids, liquids and gases (the discovery of plasma, the fourth phase of matter, lay centuries in the future). Back then, solids and liquids were much harder to work with than gases because changes in solids and liquids were difficult to measure with the equipment of the time. So many experimentalists played around with gases to try to deduce fundamental physical laws. Robert Boyle was perhaps the first great experimentalist, and was responsible for what we now consider to be the essence of experimentation: vary one or more parameter, and see how other parameters change in response. Boyle discovered the relationship between the pressure and volume of a gas, and a century later, the French scientists Jacques Charles and Joseph Gay-Lussac discovered the relationship between volume and temperature.
eLearning Template Library | eLearning Brothers | eLearning Template Library | Tons of templates to create awesome courses! Flightplans for Learning: Differentiation & Deep Thinking with Technology Elements of a Flight Plan Consider each of the following elements of an effective flight plan. Destination Departure & Arrival Times Estimated Times Alternative Airports Instrument or Visual Guidance Flight Rules Airway Route Fuel Passenger Experiment! Like the FAA's required plan (on the right), you probably have a standard format for lesson plans.
Marketing for Libraries What do people want and need from a library? What services can your library provide? How can services be connected with the needs of current and potential library users? Marketing is much more than creating attractive displays and updating your Facebook page, it's about meeting the needs of individuals and groups. Marketing is about understanding the needs and interests of current and potential users, reaching those individuals with quality resources and services, and evaluating the experience so adjustments can be made to increase effectiveness, efficiency, and appeal. Regardless of whether you're interested in academic, school, public, corporate, health, and/or other special library or information settings, this course is a great elective. Explore the Course Materials section to read the Syllabus, explore the Calendar, Tips and Checklist, or access the Course Guide.
Free Interactive Whiteboard Resources Interactive whiteboard resources are a great way for teachers to engage classrooms in learning. While many teachers are spending hours a day creating their own activities for their interactive whiteboards, there are tons of free sources to help teachers learn about and use IWBs with students to further their use of technology in the classroom. Here is a list of some great interactive whiteboard resources and activities guaranteed to stimulate learning: General Interactive Whiteboard Resources for Teachers TeacherLED – TeacherLED is a site dedicated to making the use of Interactive Whiteboards (IWB) easier and more productive. With many kids at home due to COVID-19, maintaining the same level of physical... The recent ongoing pandemic has schools reimagining how they celebrate their... With the school year coming to a close, providing closure for students is... Delivering quality education to students through eLearning can be difficult.... Interactive Whiteboard Games & Activities
The History of Encryption The History of Encryption 700 BC Scytale The Spartan military used scytales to send sensitive missives during times of battle. Both sender and recipient had a wooden rod of the exact diameter and length. To encrypt a message, the sender tightly wound a piece of leather or parchment around the stick and wrote a message on it. The unwound leather was sent to the recipient, who could only read a message once it was tightly wound around his own scytale. 1467 Alberti cipher Leon Battista Alberti invented and published the first polyalphabetic substitution cipher, changing the course of encryption forever. 1797 Jefferson wheel Invented by Thomas Jefferson while he was George Washington's secretary of state, the wheel consisted of 26 cylindrical wooden pieces threaded onto an iron spindle. 1943 Enigma machine 1961 First computer password Developed by MIT's CTSS (Compatible Time-Sharing System), when computer time was scarce, extremely expensive and limited to research institutions. 1995 "Hackers"
Tech Literacy II: Skills for the Online Instructor "Technology is just a tool. In terms of getting the kids working together and motivating them, the teacher is the most important." — Bill Gates Maybe you have been tapped to offer a popular course via the Internet, or you are looking to take advantage of the growing opportunities available to expand your professional portfolio. Online teaching has many advantages for students and teachers, such as 24-hour availability and a wealth of readily available resources. But it also has significant disadvantages, such as a lack of face-to-face contact and the distraction of being just a click away from online games not related to the course. However, if you are willing to embrace the strengths and weaknesses of the medium, you can open the doors to an outstanding educational experience for your students and yourself. Even if you are not currently tech-savvy, computer skills and the knowledge to create, manage, and teach courses online can be gained with perseverance and guidance. Web 2.0 Literacy
The World Factbook People from nearly every country share information with CIA, and new individuals contact us daily. If you have information you think might interest CIA due to our foreign intelligence collection mission, there are many ways to reach us. If you know of an imminent threat to a location inside the U.S., immediately contact your local law enforcement or FBI Field Office. For threats outside the U.S., contact CIA or go to a U.S. In addition to the options below, individuals contact CIA in a variety of creative ways. If you feel it is safe, consider providing these details with your submission: Your full name Biographic details, such as a photograph of yourself, and a copy of the biographic page of your passport How you got the information you want to share with CIA How to contact you, including your home address and phone number We cannot guarantee a response to every message. Internet: Send a message here. Mail: Inside the U.S., send mail to the following address: