Apps like Epson’s iProjection allow teachers to let their students connect directly ... middle and high school is most likely the overhead projector. Who doesn’t remember the thrill of being allowed ...

Appeldorn specifically reached out to businesses and teachers to push the product. His marketing efforts worked: 3M became a major manufacturer of overhead projectors, and it wasn’t long before the ...

When Chris Knight started teaching in 2011, overhead projectors were being replaced by smartboards and teachers could finally project slides directly to the whiteboard from their laptops. Technology ...

During Covid school closures, teachers, accustomed to using overhead projectors and pencil and paper in classrooms, had to learn to use new technology so their students could learn from home. When ...

But most classrooms used an overhead projector – which was a machine that could show pictures and words, meaning teachers didn’t need to use a blackboard anymore. Most schools in the 1990s ...