Teaching
and
Learning
with
Technology
Teaching
Teaching
and
and
Learning
Learning
with
with
Technology
Technology
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Chapter 4
Digital
Technologies
In the
Classroom
Teachingand
and Learning
with
Technology
Teaching
Learning
with
Technology
Allyn
Allynand
andBacon
Bacon2002
2005
Devices
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Classroom
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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
• Flat bed scanners can scan one page or
multiple pages and can scan from a book
Teachingand
and Learning
with
Technology
Teaching
Learning
with
Technology
Allyn
Allynand
andBacon
Bacon2002
2005
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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 varies from CD-Rs to
memory cards
Teachingand
and Learning
with
Technology
Teaching
Learning
with
Technology
Allyn
Allynand
andBacon
Bacon2002
2005
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Digital Cameras
• Stored images are then downloaded to
computer for viewing and editing
• Typically 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 software
programs or can be printed on photographic
paper to create hard copy photos.
Teachingand
and Learning
with
Technology
Teaching
Learning
with
Technology
Allyn
Allynand
andBacon
Bacon2002
2005
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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
Teachingand
and Learning
with
Technology
Teaching
Learning
with
Technology
Allyn
Allynand
andBacon
Bacon2002
2005
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Sound Input Devices
• Personal microphones are a component of
most multimedia computers
• Mikes plug into the sound card port on the
back of the machine
• The mike can be used to add commentary
or record music to enhance a computer
presentation or tutorial
Teachingand
and Learning
with
Technology
Teaching
Learning
with
Technology
Allyn
Allynand
andBacon
Bacon2002
2005
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Pen Input Devices
• Used with
– Personal Digital Assistants (PDAs)
– Tablet PCs.
• Stylus pressed against screen
– Records commands or handwriting
– Can be read later as a word processed
file
• PDA can also provide management tools
Teachingand
and Learning
with
Technology
Teaching
Learning
with
Technology
Allyn
Allynand
andBacon
Bacon2002
2005
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Tablet PCs
• Basically an LCD screen mounted over a
motherboard with a hard disk drive
• Tablet PCs are portable, convenient, and
lightweight.
• They often offer wireless access to
networks
Teachingand
and Learning
with
Technology
Teaching
Learning
with
Technology
Allyn
Allynand
andBacon
Bacon2002
2005
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Tablet PCs
• Converts handwriting into a word
processing file
• Drawings saved as graphics files.
• In essence, just a large, more powerful,
and more flexible PDA
Teachingand
and Learning
with
Technology
Teaching
Learning
with
Technology
Allyn
Allynand
andBacon
Bacon2002
2005
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Touch Screens
• Computer monitor screens, sensitive to
touch
• Touch screens best used to issue
commands and make selections
• Also useful assistive device for students
with limited motor skills
Teachingand
and Learning
with
Technology
Teaching
Learning
with
Technology
Allyn
Allynand
andBacon
Bacon2002
2005
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Video / Digital Capture
• Video capture cards let you
– Capture single still images of each video frame
as a digital file
• Once digital, the sequence of images can
be edited
– Can then be used as a digital video or digital
still images
Teachingand
and Learning
with
Technology
Teaching
Learning
with
Technology
Allyn
Allynand
andBacon
Bacon2002
2005
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Electronic Whiteboards
• Dry erase markers can be used to write or
draw on them
• Can then capture the writing or drawing and
save it as a digital file
• Whiteboard files can be printed or shared
electronically
• Portable devices can convert regular
whiteboard into an electronic whiteboard.
Teachingand
and Learning
with
Technology
Teaching
Learning
with
Technology
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Allynand
andBacon
Bacon2002
2005
Output Devices in the Classroom
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Data Projection
• LCD Projection Panel
• Sits on top of overhead projector and
plugged into the computer
• Uses the overhead projector’s light
source for display
• Generally replaced by LCD projectors
Teachingand
and Learning
with
Technology
Teaching
Learning
with
Technology
Allyn
Allynand
andBacon
Bacon2002
2005
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Data Projection
• LCD Data Projector
• Data/video projectors connect to the
computer to display room-size image
• Use LCD technology but have their own
light source
• Can be used as a portable desktop unit
or fixed to the ceiling
Teachingand
and Learning
with
Technology
Teaching
Learning
with
Technology
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Allynand
andBacon
Bacon2002
2005
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Data Projection
• LCD Data Projector
• Display both digital images (from
computer) and video images (from VCR)
• Usually includes speakers and remote
control
Teachingand
and Learning
with
Technology
Teaching
Learning
with
Technology
Allyn
Allynand
andBacon
Bacon2002
2005
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Data Projection
• Scan Converter
• Converts digital computer signal for
display on a TV
• Very inexpensive compared to other
digital display devices
• Resolution may be limited by TV’s
display
Teachingand
and Learning
with
Technology
Teaching
Learning
with
Technology
Allyn
Allynand
andBacon
Bacon2002
2005
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Speakers and Headphones
• Small speakers plug into sound card
port
– Plays sound associated with software
• Most sound cards also have headphone
port
• To accommodate multiple headphones,
a splitter can be used
Teachingand
and Learning
with
Technology
Teaching
Learning
with
Technology
Allyn
Allynand
andBacon
Bacon2002
2005
Technologies for Special Needs
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•
Portable writing devices for those who
can’t grasp a writing instrument
• Alternative keyboards for those with
visual, physical, or cognitive limitations
• Voice recognition systems for reading
and organizing
• Universal access stations
– A multimedia computer, scanner, OCR
software, alternative keyboards, textto-speech software, and other
assistive devices.
Teachingand
and Learning
with
Technology
Teaching
Learning
with
Technology
Allyn
Allynand
andBacon
Bacon2002
2005
Emerging Technologies
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Wireless Devices
• Computers and handhelds can be
connected to a network
• Wireless Fidelity (WiFi) technology used
for very fast radio frequency
connections.
• Wireless networks eliminate cost of
retrofitting schools for network cables
• Wireless networks improve flexibility
Teachingand
and Learning
with
Technology
Teaching
Learning
with
Technology
Allyn
Allynand
andBacon
Bacon2002
2005
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Handheld Computers
• Have scaled-down versions of software
found on PCs
• Newer handhelds are expandable
– Use small expansion cards
• Handhelds often come with
– sound
– Microphone
– color for multimedia programs
Teachingand
and Learning
with
Technology
Teaching
Learning
with
Technology
Allyn
Allynand
andBacon
Bacon2002
2005
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E-Books
• Electronic books are tablets
– Display an electronic multimedia version
of a book
– E-books can let you take notes as your
read
• A single tablet can store many books
• Can be read and/or listened to using
simple navigational controls
• Some PDAs include e-book capability
Teachingand
and Learning
with
Technology
Teaching
Learning
with
Technology
Allyn
Allynand
andBacon
Bacon2002
2005
Emerging Technologies
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Voice Activated Devices
• Voice activation software lets you speak
to the computer
• Eliminates need for typing or clicking
• Voice input technology widely used as
assistive device
• Voice activation can make computing
more flexible
– Frees users from proximity to keyboard
or mouse
Teachingand
and Learning
with
Technology
Teaching
Learning
with
Technology
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Allynand
andBacon
Bacon2002
2005
Emerging Technologies
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Computer Enhancements
• Improved Microprocessors
• Chips are becoming faster and more
powerful
• More powerful CPUs will perform
complex task faster
Teachingand
and Learning
with
Technology
Teaching
Learning
with
Technology
Allyn
Allynand
andBacon
Bacon2002
2005
Emerging Technologies
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Computer Enhancements
• Storage and Memory
• RAM chip size increasing making
programs faster to access
• Storage increasing making possible
larger programs
• Other storage devices developed to
maximize portable storage.
Teachingand
and Learning
with
Technology
Teaching
Learning
with
Technology
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andBacon
Bacon2002
2005
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Computer Enhancements
• The USB drive
• Also called a keychain, flash, or jump
drive
• Size and shape of a small highlighter
• Plugs into a computer’s USB port
• No moving parts
• Large storage capacity (16 Mb to 1 GB)
Teachingand
and Learning
with
Technology
Teaching
Learning
with
Technology
Allyn
Allynand
andBacon
Bacon2002
2005
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Virtual Environments
• Virtual reality software and hardware can
create 3-D environments
• VR worlds can be representations
– Aspects of the real world
– Completely imaginary
• VR worlds can take students on “virtual
fieldtrips”
Teachingand
and Learning
with
Technology
Teaching
Learning
with
Technology
Allyn
Allynand
andBacon
Bacon2002
2005
Computers in the Classroom
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• Computer hardware makes it possible
to enhance teaching and learning
• Computer software focuses hardware
on classroom specific tasks
• Teachers should review and evaluate
both hardware and software carefully to
ensure they have selected the best
tools for teaching and learning
Teachingand
and Learning
with
Technology
Teaching
Learning
with
Technology
Allyn
Allynand
andBacon
Bacon2002
2005