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 ...

This program features hands-on practice sketching composites and performing other relevant drawing exercises. This course demonstrates how to use an opaque projector and freestanding easel instead of ...

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 ...

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 ...

When you're scheduled to make a presentation on a digital projector, you depend on properly functioning video equipment to display the files you've prepared for your talk. Just in case, it helps to ...

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 ...