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How have projection technologies changed over time?
How have projection technologies changed over time?
Learning intention
We are learning about projection technologies used in classrooms in the past.
Success criteria
We can sequence historical objects.
We can describe what a projector is and how it works.
We can state advantages and disadvantages of manual projectors.
What is a projector?
What is a projector?
Recall the projectors you saw at the Schoolhouse Museum, including the magic lantern, epidiascope and later classroom projectors shown in the photograph.
Think, pair, share
Think, pair, share
Define the word 'projector'.
For example, 'A projector is a machine with a lens that shows pictures or videos on a big screen or wall so lots of people can see it.'
Discuss
Discuss
Before television and the Internet, projectors brought images of the world into classrooms.
How are images shared with classes today?
How has the speed of sharing and projecting changed?
Projectors from the 1950s and 1960s on display at the NSW Schoolhouse Museum.
Shown from left to right: Beseler Vu-Lite II Episcope opaque projector, Hanimex Eiki 16mm projector, Vumax slide and filmstrip projector, Hanimex Syllabus 2000 slide and filmstrip projector, Hanimex Hanimette filmstrip and slide projector
Shown from left to right: Beseler Vu-Lite II Episcope opaque projector, Hanimex Eiki 16mm projector, Vumax slide and filmstrip projector, Hanimex Syllabus 2000 slide and filmstrip projector, Hanimex Hanimette filmstrip and slide projector
Using evidence – projectors from the past
Using evidence – projectors from the past
Examine the photographs of projectors. With a partner, discuss and record your ideas:
What do you notice?
What materials is it made from?
Does it look old or new?
How might it work?
Compare two projectors using a T-chart.
Place each projector on a timeline from oldest to newest.
Explain the evidence you used to justify each placement.
Magic lantern, circa 1890
Vumax slide and filmstrip projector, circa 1960
Epidiascope projector, circa 1940
Hanimex slide and filmstrip projector, circa 1980
Which projector?
Which projector?
Slides and filmstrips were loaded by hand into different projectors.
What are the advantages and disadvantages of manual projectors?
Match each slide or filmstrip to the correct projector.
Hand painted glass slides, circa 1890
Photograph of a cathedral on a large glass slide, circa 1930
Plastic filmstrips, circa 1950 and 1960
Plastic slides of photographs, circa 1980
Story of the magic lantern
Story of the magic lantern
Magic lanterns were the first projectors.
View the YouTube video to learn their story.
Extension – Watch again and record the main ideas as dot points.
True or false?
True or false?
A magic lantern projector used a bright light to show pictures – T or F?
A magic lantern projector showed pictures from glass slides. – T or F?
A magic lantern projector made pictures smaller on a screen – T or F?
People used magic lantern projectors before electric projectors were invented. – T or F?
Magic lantern projectors were used to tell stories and teach lessons – T or F?
A magic lantern projector used a computer to show pictures – T or F?
Epidiascope projector
Epidiascope projector
The epidiascope was one of the first electric classroom projectors.
It combined two projectors in one – a long lens for projecting transparent glass slides and a short lens for projecting opaque images, such as book pages.
View the video to learn more then complete the cloze passage.
Cloze passage
Cloze passage
Words: projector, two, glass, books, picture, diagram
An epidiascope is a type of __________________. It has ______ lenses. The long lens is a diascope for projecting transparent slides made of __________. The short lens is an episcope for projecting opaque images such as _____________. Teachers used an epidiascope to help the whole class view a _____________ or _______________ at the same time.
Build a simple projector
Build a simple projector
Create a simple projector using a shoe box, torch and transparent sheet.
Test how light projects an image onto a surface and explore how a projector works.
Simple shoe box projector
Vocabulary match
Vocabulary match
Cut out the words and their meanings separately.
Give 6 to 8 to each pair of students.
Students match the words to the meanings.
Discuss how it relates to a projector.
Advertisement for a social studies wall chart titled How People Talk to Each Other. It was available for sale to Australian schools in the early 1960s.
Vocabulary
Vocabulary
Display – to show something so people can see it
Filmstrip – a long strip of plastic film with a series of frames with pictures and words
Filmstrip projector – a machine that projects pictures from a filmstrip
Glass slide – a transparent image made of glass that can be shown using a projector
Image – a picture
Lens – a clear piece of glass that helps make a picture bigger
Light – a bright beam that shines through a projector to show a picture
Magic lantern – a projector with a spirit lamp inside it
Plastic – a light material made from chemicals
Project – to make a picture or words appear larger on a screen or wall
Projector – a machine that makes pictures, words and movies appear big on a screen or wall
Screen – a white surface on which pictures are shown
Slide – a transparent image that can be shown with a projector
Spirit lamp – a light that has a wick that burns a liquid spirit such as kerosene
Spool – a cylinder used to wind a film or filmstrip
Transparent – can be seen through, like clear plastic or glass
Technology – tools and machines that help people do jobs or learn new things
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