Unless you’re an ace draftsperson or prefer to work directly on a surface, enlarging a design without tracing can be a chore, even for some Old Masters. Vermeer, for one, is believed to have used a ...

John Breeden II is an award-winning reviewer with more than 20 years of experience covering technology. Follow him on Twitter @TheLabGuys. The Epson DC-21 Document Camera offers an inexpensive tool ...

John Breeden II is an award-winning reviewer and public speaker with 20 years of experience covering technology. Opaque projectors have been a part of classrooms for years. They were large boxes that ...

The American Biology Teacher, a nationally recognized journal, offers articles on recent advances in biology and life science, instructional activities for the classroom and laboratory, and ...