Thursday, 21 December 2017

TO USE A VISUAL PROJECTOR TO DISPLAY AND SHARE INFORMATION TO THE CLASS

TO USE A VISUAL PROJECTOR TO DISPLAY AND SHARE INFORMATION TO THE CLASS

VISUALISER” also called “DOCUMENT CAMERA” and “VISUAL PRESENTER” is a digital teaching tool that will allow instructors / students to display and share a much wider range of information to the whole class and bring lessons to life!


The visualiser/document camera is a COST-EFFECTIVETIME-SAVING, and EASY-TO-USE ICT (Information & Communication Technologies) tool. Simply connect the visualiser/document camera with a projector or monitor or interactive whiteboard and just switch it on. All that’s left to do is to place the desired object under the camera.
A visualiser/document camera is an extremely flexible teaching tool which allows teachers or students to display just about anything from a piece of paper to a piano, in glorious color, or even a person in a room. You can point, annotate, zoom in and out, or get different views by turning the arm/camera-head of the visualiser/document camera. Its flexibility can also help to develop teachers’ and students’ creativities.
Why is the visualiser/document camera a favorite ICT tool for daily productive teaching? Because it is so simple to use for enriching lessons. Teachers do not need to waste their precious time on learning how to use this ICT tool so they can concentrate on planning lectures or spending more time with students.

PROJECT AND ENLARGE ANY OBJECT ONTO A BIG SCREEN ...

Display a real object on a big screen and turn your classroom into a spontaneous and dynamic learning environment.
Enlarging an object improves students’ understanding of a concept, increases curiosity and reinforces teaching points. Also, all students are able to see what is being projected from any point in the class, which can reduce crowding and classroom management issues.

CLEARLY DEMONSTRATE PRACTICAL SKILLS...

Visualisers / Document Cameras help ensure improved comprehension of complex instructions.Students’ manual dexterity and fine motor skills are enhanced, including brushwork, cutting and sawing, through modeling the activities under the Visualiser / Document Camera!

BRING YOUR LESSONS TO LIFE
Use the magic of the Visualiser / Document Camera and turn mini beasts into massive monsters! Students are instantly engaged by the truly visual nature of the Visualiser / Document Camera.
Teachers can easily zoom-in on LIVE objects and show their moving and minute features to students by using Visualisers / Document Cameras instead of playing an unexciting life-cycle movie. Showing real things can be the most impressive way of teaching.

CREATE AN INTERACTIVE CLASS

Make your students come to the board and be more active with the class! Offer a new and better way of communication that can be developed between the teacher and the whole-class.
Students are able to share their work on the board immediately, and show the rest of class what they have learned as well as the outcome of their understanding. Visualisers / Document Cameras truly enhance student involvement with the lessons as well as inspire creativity.

SAVE YOUR PRECIOUS TIME AND MONEY...

Think about how much time the teachers spend on downloading or searching for an image to use, or trying to photocopy a text into large scale. Many teaching materials are just around you, and they are real things even better than clip art. How about just placing them under the Visualiser / Document Camera ?

The Visualiser / Document Camera can be a time&money saving tool that reduces the amount of lesson preparation activity, such as copying & printing and allows you to use delicate or costly resource items.

HOW TO TEACH A LESSON USING INTERACTIVE WHITEBOARD

HOW TO TEACH A LESSON USING  INTERACTIVE WHITEBOARD
Interactive Whiteboards (IWBs) have held a prominent place in conversations about technology integration in the American schoolhouse for nearly a decade. Teachers see IWBs as motivating gadgets that can capture the attention of students. School leaders see IWBs as tangible symbols of innovation and reform that can be touted on parent nights, and policymakers see IWBs as the key to preparing students for the 21st Century. Even Barack Obama believes that IWBs should play an important role in tomorrow’s classrooms, writing during his 2008 presidential campaign:
Imagine a future where our children are more motivated because they aren’t just learning on blackboards, but on new whiteboards with digital touch screens; where every student in a classroom has a laptop at [his or her] desk; where [students] don’t just do book reports but design PowerPoint presentations; where they don’t just write papers, but they build web sites; where research isn’t done just by taking a book out of the library, but by emailing experts in the field; and where teachers are less a source of knowledge than a coach for how best to use it and obtain knowledge. By fostering innovation, we can help make sure every school in America is a school of the future.1
The challenge with IWBs is a simple one, however: They are costly investments that do little to automatically encourage innovative teaching. Described by honest companies as a bridging technology designed to bring digital tools into traditional classrooms, they do more to facilitate existing practices — whole class lectures and presentations, independent work by individual students at “the board” — than they do to transform learning. Sadly, this pattern has become all too common — and comfortable — in digital integration efforts. As Clayton Christensen, Curtis Johnson, and Michael Horn demonstrate in Disrupting Class: How Disruptive Innovation Will Change the Way the World Learns, most teachers use new technologies like IWBs to simply “sustain their existing practices and pedagogies.” 2
STRATEGIES FOR INNOVATION
That doesn’t mean that the Interactive Whiteboard in your classroom — especially if it is paired with sets of student responders and/or wireless slates — can’t be used to innovate. Like any tool in the hands of a talented teacher, careful decisions and systematic efforts can help to ensure that your IWB doesn’t go to waste. If you’re lucky enough to work in a school or a district that has outfitted classrooms with IWBs, consider the following strategies for making the most of this digital investment.
ASK OPEN-ENDED QUESTIONS WITH RESPONDERS
For many teachers, the immediate feedback offered by the sets of student responders often paired with IWBs is invaluable. With little effort, teachers can collect formative assessment information that can be used to inform practice “in the moment.” And while this kind of work is responsible and intelligent, it can lead to an over-reliance on lower-level multiple choice questioning techniques.
To avoid this trap, begin using your student response systems to ask open-ended Likert scale style questions in your classroom — How much should the world care about global warming? What responsibility do wealthy countries have to support development in poor countries? How important is freedom of speech? Then, give your students a range of common perspectives to choose from. After you’ve initially surveyed your class, encourage students to share their perspective and deliver a lesson connected to the content that you are studying. When your lesson is finished, resurvey your class and see whether or not student perspectives have changed. Encourage students who revised their original thinking to explain the reason for their revisions. By doing so, you can ensure that your IWB promotes higher-order thinking in your classroom.
GET YOUR WIRELESS SLATES IN THE HANDS OF YOUR STUDENTS
One of the most valuable tools often bundled with Interactive Whiteboards are wireless slates or tablets that can be used to control the IWB from anywhere in a room. Slates unchain teachers from the front of the class and allow them to move freely throughout their room to monitor and manage the progress of their students while continuing to present key concepts.
Slates become even more valuable, however, when they are put into the hands of students. Consider having students use slates to work out different solutions to a common problem. Ask your class to watch for mistakes or misconceptions as a peer completes a task transparently. Create comparison/contrast activities that allow groups to consider the common characteristics of a concept that you are studying in class by manipulating a collection of important vocabulary words. Whatever you do, recognize that student-centered IWB activities depend on your willingness to put IWB hardware into the hands of your students.
RECORD YOUR LESSONS AND POST THEM AS TUTORIALS
In a world where the range of abilities within each classroom is becoming increasingly diverse, creating opportunities for remediation is nothing short of essential. Unfortunately, structuring targeted remediation efforts can be overwhelming for already overworked educators.
That’s why innovative teachers have started to use the screen-capturing software packaged with IWBs to record full-length lessons and mini-tutorials for their students. After each lesson is recorded, it can be posted online in a remediation warehouse. Students who fail to demonstrate mastery can be pointed to specific tutorials designed to reinforce classroom teaching. What’s more, parents can visit tutorial collections and learn to provide more effective support for their children at home.
REQUIRE STUDENTS TO WORK THROUGH “ENHANCED PRESENTATIONS” WHILE WORKING TO PERSUADE
With the explosion of visual content available online, the very nature of persuasion is changing. No longer are the most influential ideas communicated in text-based presentations. Unfortunately, however, text-based presentations remain the norm in most school classrooms.
To better prepare your students for the multimedia world that they will inherit, require that presentations in your classroom draw from the full range of interesting content available online. Have your students integrate short video clips and websites that can be used to influence their audience into their final products. Instead of creating simple slide decks with static content, insist that presentations utilize the full range of tools offered by your IWB. While initial efforts are likely to be balky, your students will eventually learn to toggle between the content and tools that are the most effective at communicating key points.
LET YOUR STUDENTS IMAGINE USES FOR YOUR IWB
For whatever reason, schools have been notoriously bad at seeking feedback from their primary customers — the students sitting in their classrooms. Instead of co-creating motivating learning environments together, teachers generally continue to struggle when asked to relinquish authority over instructional decisions.
This hesitance carries great consequences — especially in an environment where students are far more comfortable with imagining new uses for digital tools than their teachers. That’s why the most progressive teachers turn control over their IWBs to their classes. By asking your students to reflect on the kinds of learning experiences that they find the most motivating and then giving permission for free exploration with your IWB, you’ll not only be surprised by the quality of the discoveries that they make, you’ll also convince your students that they are capable thinkers and learners — and equal partners in the cycle of instruction.
VISIT THE LESSON LIBRARIES CREATED BY THE MAJOR IWB COMPANIES
As skeptical as some critics are about the impact that Interactive Whiteboards can have on classroom teaching, there are some truly remarkable educators that are using their IWBs to effectively change their classrooms. Many of these educators freely share what they are learning in lesson libraries maintained by the major IWB companies.
After signing up for free accounts at Promethean Planet or the Smart Training Center, you’ll gain access to lesson collections sorted by content area and grade level. You’ll also see streaming video of teachers using their IWBs in their classrooms. All of these opportunities can help you to think through the kind of teaching and learning that IWBs make possible.
Sharing best practices
As you begin to design lessons and activities with your Interactive Whiteboard, be sure to share everything that you learn with your peers! While good applications of IWB technology exist, they can often be time consuming to imagine and to create. Working together over time, your faculty can document the kinds of practices that are the most effective at delivering content and engaging your student population. Doing so will ensure that your IWB becomes something more than a tool that simply sustains existing pedagogies.


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Education related websites and videos

How to operate a tablet??

HOW TO OPERATE A TABLET PC
Android tablets are digital slates running the Android operating system. They can be used for multiple purposes like: checking e-mails, playing games, watching videos, and listening to music. It can also be used as a camera or camcorder. However, an Android tablet is a bit different from an Android phone. Not only is the form-factor different, the user-interface is different too.
Set up your Android tablet. You'll need a Google account to download apps via the Google Play Store.
Understand
 the functionality of the three-basic touch-capacitive keys. These basic control keys are used for controlling applications and other basic commands:
·         The home button: This is used to jump to the home screen of your Android device. If pressed in between another activity (game, or application), the OS puts the activity in the background. Using this button will, usually, not shut down any application or game; instead, it will run in the background.
·         The back button: This is used to go to the previous page or activity.
·         Multi-tasking button: Android tablets running Ice Cream Sandwich (4.0) and higher will have a multi-tasking button (parallelogram-shaped button). Tapping this button will give a list of all applications running in the background. Swapping a running application to the left or right (in the multi-task screen) will close the application. This is particularly useful to clear RAM and speed up the device.
·         Older Android tablets may have a Menu (or settings) button (represented by three parallel horizontal lines). This button gives the user access to additional options for particular apps. This button is not found on devices running Ice Cream Sandwich or Jelly Bean out of the box.

Check the version of Android your tablet is running on
. Different tablets run on different versions of the Android OS. The Android version can be found in the About Tablet section of the settings panel.
·         Most tablets run on Android Ice Cream Sandwich (4.0) or higher. The latest version of Android is Lollipop (5.0.x). Generally, the higher the version of Android, better will be the device performance.
·         Some older tablets run on Android Honeycomb (3.x). Honeycomb was a tablet-specific version which wasn't available for mobile phones running on Android.
·         The OS version gives a brief idea of the features packed in a tablet. For example: Tablets (and phones) running on Jelly Bean version have Google Now (voice-assistant service by Google) in-built.

Download applications
. Google Play Store has a vast collection of tools, applications and games that will make your Android experience much better.
·         Download an office app that will help you view and/ or edit documents. Most Android tablets come with an in-built document viewer. If you want to download a free office editor for Android, try downloading the Kingsoft Office application.
·         Try using your Android device to take notesadd calendar events and get directions. It can be used for various other activities too.
·         Try installing wikiHow's Android application that contains our huge collection of how-to articles!

Customize your Android.
 Google's open source Android OS gives you the power to customize your device.
·         Make custom Android smart actions. Setting up smart actions will carry out specific activities when specific conditions are met. Smart actions can be customized to suit your needs. Note: Smart actions may not be available on all devices. However, you can download similar apps from the Google Play Store.
·         Adjust Screen Timeout. The screen timeout time can be a drain on the battery, especially if it is too long. Setting up a screen timeout is the one of the best ways to save power while your tablet is on.
·         Create your own wallpapers, widgets, etc.

Speed up your device
. Speeding up your device can be done in a number of ways
·         Update your version/ firmware. Device manufacturers roll out updates occasionally to fix bugs, reduce lags, and improve performance. Be on the look out for updates for your device.
·         Download a task-killer and anti-virus applications. Some devices come with an in-built task manager while most don't. Task manager will allow you to close the apps that are running in the background (and use up RAM). Anti-virus application will keep you safe from any external threats.
·         Remove unneeded widgets from the home screen. Widgets are useful to quickly access important apps or get information. However, unneeded widgets use up a lot of processing power and will slow down your tablet.
Configure Sync options. Syncing is an efficient way to transfer data like pictures, videos, contacts, messages, emails, and more, between many devices (including your PC). To configure synchronization options for apps or accounts, go to Settings -> Accounts & sync.
·         Sync your Gmail emails, contacts, calender with Windows Outlook or other accounts.
·         Set up Gmail in Microsoft Outlook. Set the server type to IMAP. Set the incoming mail server to imap.gmail.com and outgoing mail server to smtp.gmail.com. Enter log-in information (Gmail username and password). Under "More Settings", open the Advanced tab. Set incoming server to 933 with SSL encryption and your outgoing server to 587 with TLS encryption.
·         Set up Gmail in Mozilla ThunderbirdMozilla Thunderbird is a cross-platform open-source email client. To set up Gmail in Thunderbird, first, enable IMAP in your Google account settings. Open Thunderbird and go to Tools -> Account Settings. Add a new mail account; and input your name, email-address and password. Thunderbird will automatically try to configure your Gmail account for Thunderbird.


How to work on a digital camera??

HOW  TO  OPERATE A DIGITAL CAMERA
A digital camera is a fun investment. You can use a digital camera to take pictures of people, places, and scenery. If you're new to a digital camera, how to best use the device can be confusing. To start, figure out the basics of how your camera works and take a few pictures. From there, adjust your settings for best quality. Follow some basic tips and tricks to make your photos stand out.Turn the camera on. The first step to using a digital camera is simply turning the device on. Most cameras have a small on button located somewhere on the side of the camera. If you don't see your camera's on button, read your manufacturer's instructions. They should explain how to find the on button.
·         Most digital cameras have to charge. If your camera's battery is dead, it will not turn on. Don't panic if your camera is not turning on. Usually, a charger comes with the camera. The charger plugs into the wall and then into your camera. In the event your camera does not turn on, try plugging it into the charger, waiting a few minutes, and then trying again.

Insert a memory card.
 Most digital cameras only have enough storage to hold a few pictures on their own. You'll need to insert a memory card into your camera so it can hold a large amount of photos. You can buy a memory card at most electronic stores or supermarkets.
·         The most common type of memory card is the Secure Digital (SD) memory card. These are compatible with the vast majority of digital cameras. A Secure Digital 'Xtra Capacity (SDXD) memory card holds more pictures than the SD, but may not be compatible with older digital cameras. xD memory cards are also compatible with the majority of digital cameras, as are Multi Media Cards 

·        Other types of memory cards, like xD Picture Memory Cards and Memory Stick Duo Memory Cards, are only compatible with certain types of cameras. Your camera's user manual should say which memory cards are compatible with your camera. The packaging of a memory card should also indicate which cameras are compatible with that card.

Familiarize yourself with the buttons.
 Digital cameras come with a variety of buttons. You should spend some time familiarizing yourself with what these buttons do. Some buttons help you zoom in and take pictures. Others allow you to adjust settings on your camera.
·         The shutter button is a small button, usually on the top right corner of the camera, you press down when taking a picture. The zoom button is usually a long line, which you toggle back and forth to zoom in and out on a subject. These are the basic buttons you need to take a picture.
·         The "mode" button is usually a rectangular button labeled "mode." You press down on this button to switch from picture mode to video mode, in the event you want to shoot videos. A rectangular button labeled "menu" allows you to switch the settings on your camera. You usually navigate through the menu mode with the hep of a scroll wheel you rotate to select and adjust settings.
·         A triangle-shaped button, much like the play button on your VCR, allows you to playback pictures you just took. You can scroll through pictures using the scroll wheel.

Take a few pictures. If you want to start using your camera, begin by taking a few pictures. Choose a subject, like a landscape or a pet, focus your camera for a moment, and then press the shutter button. The camera should capture this image. To get the hang of using your digital camera, take a few pictures around your house.

View your pictures.
 Once you've taken a few practice pictures, review your pictures. Press down on the play button. The pictures you just took should appear on your camera's screen. You can scroll through the pictures using the scroll wheel.
·         As these are just practice pictures, you may want to delete them. You can usually select an image on screen using the scroll wheel, shaped something like a trash can, to delete unwanted pictures.
Transfer your photos to your computer. Once you've taken enough photos, you can upload your photos onto your computer. The process is usually fairly self-explanatory and depends on the type of camera you have. If you're confused, refer to your instruction manual.
·         You would plug your camera into your computer using a USB cord or a similar device. From there, something should comes up saying something along the lines of "Get photos" or "Download pictures." You would click that button and the pictures should upload smoothly.
·         You should delete the photos off your camera once they're on your computer. This will free up space for more photos.



How to operate a computer??

HOW TO OPERATE A COMPUTER
The essential knowledge on how to operate a computer involves these key components:
  • Keyboard
  • Mouse
  • CPU (Central Processing Unit)
  • Monitor
  • Speakers
  • Printer
  • Operating System
A computer is more than just another household appliance. The vast amount of information and possibilities can be overwhelming. But you can accomplish a lot with a computer, and using one can be a good experience. Let's walk through getting started with your first computer.
Turning on a computer for the first time can be different from one computer to the next. Your experience could be different from this lesson. It's OK to ask someone for help.
If you're using a desktop computer, you'll need to make sure that the keyboard, mouse, and monitor are plugged into the computer case before you continue.
Turning on a computer

The very first step is to turn on the computer. To do this, locate and press the powerbutton. It's in a different place on every computer, but it will have the universal power button symbol.
Once turned on, your computer takes time before it's ready to use. You may see a few different displays flash on the screen. This process is called booting up, and it can take anywhere from 15 seconds to several minutes.
Once the computer has booted up, it may be ready to use, or it may require you to log in. This means identifying yourself by typing your user name or selecting your profile, then typing your password. If you've never logged in to your computer before, you may need to create an accountThe keyboard and mouse
You interact with a computer mainly by using the keyboard and mouse, or a trackpadon laptops. Learning to use these devices is essential to learning to use a computer. Most people find it comfortable to place the keyboard on the desk directly in front of them and the mouse to one side of the keyboard.
The mouse controls the pointer on the screen. Whenever you move the mouse across the desk, the pointer will move in a similar manner. A mouse usually has two buttons, which are referred to as the left button and the right button.
You will often interact with the computer by moving the mouse pointer over something on the computer screen, then clicking one of the buttons. On laptops, you can use the trackpad, located below the keyboard, instead of a mouse. Simply drag your finger across the trackpad to move the pointer on the screen. Some trackpads do not have buttons, so you'll either press or tap the trackpad to click.
The keyboard allows you to type letters, numbers, and words into the computer. Whenever you see a flashing vertical line—called the cursor—you can start typing.
Note that the mouse pointer is also called a cursor, but it is shaped differently. The keyboard cursor is also called the insertion point.
Using a computer
The main screen you'll start from is the desktop. This is sort of like a main menu or a table of contents. From here, you can access the programs and features you need to use your computer.
Icons are used to represent the different files, applications, and commands on your computer. An icon is a small image that's intended to give you an idea at a glance of what it represents, like a logo. Double-clicking an icon on the desktop will open that application or file.
A button is a command that performs a specific function within an application. The most commonly used commands in a program will be represented by buttons. When you open an application or folder, it is displayed in its own window. A windowis a contained area—like a picture within a picture—with its own menus and buttons specific to that program. You can rearrange multiple windows on the desktop and switch between them.



Tuesday, 28 November 2017

What is PH?

What is PH?

pH is a measure of hydrogen ion concentration; a measure of the acidity or alkalinityof a solution. The pH scale usually ranges from 0 to 14. Aqueous solutions at 25°C with a pH less than seven are acidic, while those with a pH greater than seven are basic or alkalineA pH level of is 7.0 at 25°C is defined as 'neutral' because the concentration of H3O+ equals the concentration of OH in pure water.
Very strong acids may have a negative pH, while very strong bases may have a pH greater than 14.

PH EQUATION

The equation for calculating pH was proposed in 1909 by Danish biochemist Søren Peter Lauritz Sørensen:
pH = -log[H+]
where log is the base-10 logarithm and [H+] stands for the hydrogen ion concentration in units of moles per liter solution. The term "pH" comes from the German word potenz, which means "power" combined with H, the element symbol for hydrogen, so pH is an abbreviation for "power of hydrogen".

EXAMPLES OF PH VALUES OF COMMON CHEMICALS

We work with many acids (low pH) and bases (high pH) every day. Examples of pH values of lab chemicals and household products include:
0 - hydrochloric acid
2.0 - lemon juice
2.2 - vinegar
4.0 - wine
7.0 - pure water (neutral)
7.4 - human blood
13.0 - lye
14.0 sodium hydroxide

NOT ALL LIQUIDS HAVE A PH VALUE

pH only has meaning in an aqueous solution (in water).
Many chemicals, including liquids, do not have pH values. If there's no water, there's no pH! For example, there is no pH value for vegetable oil, gasoline, or pure alcohol.

IUPAC DEFINITION OF PH

The International Union of Pure and Applied Chemistry (IUPAC) has a slightly different pH scale that is based on electrochemical measurements of a standard buffer solution.
Essentially, the definition using the definition:
pH = -log aH+
where aH+ stands for hydrogen activity, which is the effective concentration of hydrogen ions in a solution. This may be slightly different from the true concentration. The IUPAC pH scale also includes thermodynamic factors, which may influence pH.
For most situations, the standard pH definition is sufficient.

HOW PH IS MEASURED

Rough pH measurements may be made using litmus paper or another type of pH paper that is known to change colors around a certain pH value. Most indicators and pH papers are only useful to tell whether a substance is an acid or a base or to identify pH within a narrow range. A universal indicator is a mixture of indicator solutions intended to provide a color change over a pH range of 2 to 10. More accurate measurements are made using primary standards to calibrate a glass electrode and pH meter. The electrode works by measuring the potential difference between a hydrogen electrode and a standard electrode. An example of a standard electrode is silver chloride.

USES OF PH

pH is used in everyday life as well as science and industry. It's used in cooking (e.g., reacting baking powder and an acid to make baked good rise), to design cocktails, in cleaners, and in food preservation.
It's important in pool maintenance and water purification, agriculture, medicine, chemistry, engineering, oceanography, biology, and other sciences.