History of Educational Technologies

Timeline created by berkayturkyilmaz
  • 1420


    Projected aids have been used since 1420.
  • A Slate Hung

    A Slate Hung
    In 1801, in Scotland, James Pillans, Head of the school and geography teacher, hung a large piece of slate on the wall to teach the students
  • George Baron

    George Baron
    In 1801, George Baron, a West Point mathematics teacher, also began to use a board of connected slates, the most effective way, he found, to illustrate complex formulas to a larger audience.
  • Public Schools in Philedelphia

    Public Schools in Philedelphia
    Although the term blackboard did not appear until 1815, the use of these cobbled-together slates spread quickly; by 1809, every public school in Philadelphia was using them.
  • Greenboard and Chalkboard

    Greenboard and Chalkboard
    While black was long the traditional color for blackboards, a green porcelain surface, first used around 1930, cut down on glare, and as this green surface became more common, the word chalkboard came into use.
  • The Blackboard

    The Blackboard
    In the US by mid-19th century, every class room had a blackboard to teach students.
  • The White Board

    The White Board
    The whiteboards came into use during the late 1980s
  • Change of Plan

    Change of Plan
    Instead of chalk pencils, whiteboard pens were used to write on whiteboards. Considering the health reasons and cost-effectiveness, by 1990s most of the class rooms were replaced with whiteboards instead of blackboards
  • Modern Version

    Modern Version
    The modern version of the blackboard is either green or brown board. This was introduced in late 1960s.
  • Steel Made Blackboards

    Steel Made Blackboards
    In the 20th century, blackboards were mostly porcelain-enameled steel and could last 10 to 20 years.