Based off the images and information from http://www.edudemic.com/classroom-technology/

The Evolution of Classroom Technology

1650 Horn Book

Wooden paddles with printed lessons were popular in the colonial era.

1850-1870 Wooden Ferule

This is a pointer and also a corporal punishment device.

1870 Magic Lantern

The precursor to a slide projector, the ‘magic lantern’ projected images printed on glass plates and showed them in darkened rooms to students. 

1890 School Slate

A board students used to practice school work on. Also, if any errors occurred the mistakes could washed away with a sponge, water, and soap.

1890 Chalkboard

A board that teachers and students could write on with chalk and erase with a clap eraser.

1900 Pencil

A writing utensil that is made from wood and has lead.

1905 Stereoscope

A device that uses binocular like glasses to look at images, accurately.

1925 Film Projector

A device that projected images, but did not have sound.

1925 Radio

A device that allowed sounds to be played from speakers.

1930 Overhead Projector

A device that is used to view items.

1940 Ballpoint Pen

A writing utensil that has ink come out of the ballpoint.

1940 Mimeograph

A device that makes copies by cranking it, manually.

1950 Headphones

A device that allows an individual to hear sounds.

1950 Slide Rule

A device that displays number measurements.

1951 Videotapes

A device that has images and sounds recorded on it.

1957 Reading Accelerator

A device that helps people read more efficiently by holding down pages.

1958 Educational Television

A device that has images and sounds that the entire class can benefit from.

1972 Scantron

The Scantron Corporation removed the need for grading multiple-choice exams.

1980 Plato Computer

Public schools in the U.S. averaged about one computer for every 92 students in 1984.

1985 CD-ROM Drive

A single CD could store an entire encyclopedia plus video and audio.

1999 Interactive Whiteboard

An interactive system that uses a touch-sensitive white screen, a projector, and a computer.