Olson uses Educreations Interactive Whiteboard, a free iPad app to record herself giving math lessons for her students.

FORBES: Can Technology Disrupt Education?

Microsoft is working on an interactive whiteboard that aims to interpret users' sketches to complete the diagrams they were drawing.

BBC: Microsoft unveils self-sketching whiteboard prototype

He does it all from the classroom via a laptop, an interactive whiteboard, and projector, bringing concepts such as "metaphor" and "simile" alive.

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