Digital Technologies in the Classroom Chapter 4 Teaching and Learning with Technology.
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Transcript of Digital Technologies in the Classroom Chapter 4 Teaching and Learning with Technology.
Input Devices in the Classroom
Scanners• Convert printed copy or images into a digital
version• With Optical Character Recognition (OCR)
software, scanned text can be saved as a word processing file
• Page scanner scan one page at a time• Flat bed scanners can scan one page or
multiple pages and can scan from a book
Input Devices in the Classroom
Digital Cameras• Do not use film but instead capture images to
a storage media• May vary in resolution – the higher the
resolution the sharper the picture but also the larger the size of the file it creates
• Storage media vary from floppy disk to memory card
Input Devices in the Classroom
Digital Cameras• Stored images are then downloaded to
computer for viewing and editing• Often come with small LCD screens on the
back of the camera to preview images as you take pictures
• Digital photos can be used in any computer software or can be printed on photographic paper to create hard copy photos.
Input Devices in the Classroom
Graphics Tablets• Use a stylus to draw on an electronic pad• Pressure of the stylus on the pad is converted
to images or commands• Allow for greater control and can therefore be
used for creating art work• The digitizer, an graphics tablet adaptation,
lets teachers add notations to a computer image
Input Devices in the Classroom
Sound Input Devices• Personal microphones are a component of
most multimedia computers• Mics plug into the sound card port on the
back of the machine• The mic can be used to add commentary or
record music to enhance a computer presentation or tutorial
Input Devices in the Classroom
Pen Input Devices• Pen input is used with Personal Digital
Assistants (PDAs)• The stylus is pressed against the PDA screen
to record commands or handwritten notes which can be later read as a word processing file
• The PDA can also provide management tools such as calendars and phone books
Input Devices in the Classroom
Touch Screens• Computer monitor screens that are sensitive
to touch• Touch screens are best used to issue
commands and make selections• They can also be a useful assistive device for
students with limited motor skills
Input Devices in the Classroom
Video / Digital Capture• Video capture cards let you stop a video and
capture single still images of each frame as a digital file
• Once digital, the sequence of images can be edited and used in sequence as a digital video or used singly as digital graphics
Input Devices in the Classroom
Electronic Whiteboards• Like traditional whiteboards, dry erase
markers can be used to write or draw on them• Electronic whiteboards can then capture the
writing or drawing and save it as a digital file• Whiteboard files can then be printed or
shared electronically
Output Devices in the Classroom
Data Projection• Data projectors display a room-size image of
the computer screen to a large group• LCD Projection Panel
• Sit on top of an overhead projector and are plugged into the computer
• Uses the overhead projector’s light source for display so they are limited by the quality of the overhead
Output Devices in the Classroom
Data Projection• Data Projector
• Uses LCD technology but has its own light source
• Can be fixed to the ceiling or used as a portable desktop unit
• Can usually display both digital (from computer) and video images (from VCR)
• Usually include speakers and a remote control
Output Devices in the Classroom
Data Projection• Converter
• Takes a digital computer signal and converts it for display on a television
• Very inexpensive compared to other digital display devices
• Resolution may not be as clear since most TV monitors to not have the display capacity of computer monitors
Output Devices in the Classroom
Speakers and Headphones• Small speakers plug into the sound card port
of a computer to play sound associated with software
• Most sound card ports also have a headphone port to accommodate the use of headphones
• To accommodate multiple headphones, a splitter can be purchased a local electronic stores
Emerging Technologies
Wireless Devices• Computers and handhelds can be connected
to a network via wireless technology• Wireless networks eliminate the cost of
retrofitting a school for network cables• Wireless networks improve flexibility by
freeing computers from cables that tether them to walls – computers can be moved to wherever learning is happening
Emerging Technologies
Palmtop Computers• PDAs are fast becoming palm top computers
with scaled-down versions of the same software found on desk top machines
• Newer palmtops are expandable via small expansion cards that can add to their capabilities
• PDAs often come with sound, microphone and color for multimedia programs
Emerging Technologies
E-Books• Electronic books are tablets that display an
electronic multimedia version of a book• A single tablet can store many books which
can be read and/or listened to by using simple navigational controls
• Ebooks can let you take notes as your read• Some PDAs include e-book capability
Emerging Technologies
Voice Activated Devices• Speaking to the computer to input data rather
than typing or clicking is accomplished via voice activation software
• Voice input technology is already widely used as an assistive device
• Voice activation can make computing more flexible by freeing users from proximity to keyboard or mouse
Emerging Technologies
Computer Enhancements• Improved Microprocessors
• Chips are becoming faster and more powerful• More powerful CPUs will make it possible to perform
more complex task faster
• Storage and Memory• RAM chip size is increasing making programs faster to
access• Storage is increasing making it possible to load and run
larger and larger programs• Other storage devices (eg. DVD-Rs) are being developed
to maximize portable storage.
Emerging Technologies
Virtual Environments• Virtual reality software and hardware can be
used to create 3-D environments• VR worlds can be representations of aspects
of the real world or completely imaginary• VR worlds can let students take “virtual
fieldtrips” to places otherwise inaccessible
Computers in the Classroom
• Computer hardware makes it possible to enhance teaching and learning in many ways
• Computer software focuses the hardware on specific tasks appropriate to the classroom
• Teachers should review and evaluate both hardware and software carefully to ensure they have selected the best tools for teaching and learning