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In the early 1800s teachers started using chalkboards in the classrooms. (pg. 186)
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In the 20th century filmstrip projectors were used in the classroom for the first time. (pg. 186)
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In the 20th century teachers started to use the overhead projector. (pg. 186)
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IN the 20th century teachers started using the motion picture in the classroom. (pg.186)
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In the 1980s microcomputers became affordable for schools to purchase. (pg.187)
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Over the past 10 years, the number of emails sent per day has increased from 2.7 billion to 274 billion. (pg.187)
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Today over 90% of adults use their cell phones. (pg.188)