Teacher Suzanne Savage had assembled her three-part overhead projector and plugged in the necessary cords, parts and accessories.
To her right, she projected a blue screen along a wall of the library at La Crescenta Elementary School, where she works.
She began to project lesson plans, instruction manuals and messed around with the zoom and auto-focus feature on her new ELMO image mate, an elaborate overhead projector for classroom instruction.
And then, anticipating student reaction, she began to wave her hands in front of the device's camera lens.
Students might consider the state-of-the-art projectors toys, but they're really instructional game-changers, teachers said.
The devices allow teachers to play DVDs, video, slideshows, as well as textbooks, writing or arithmetic assignments. They can also film and photograph.
"It makes any visuals accessible to all the students," said Katie Warren, a Glendale Unified teacher specialist who ran the training session on Thursday. "It really levels the playing field because visual learners really need to see."