Showing posts with label purchasing. Show all posts
Showing posts with label purchasing. Show all posts

Monday, September 3, 2012

Fall 2012: Grants, Contests, and More


It’s hard to muster your donkey cam kung fu without a document camera of your own! Use these opportunities to make things happen for your classroom. I will keep you posted as other companies step up to the plate for schools. Here are the only opportunities this fall to win or earn a document camera for your school or classroom, or to get a freebie:

Digital Wish for ELMO
(for the cost of shipping, when you buy an entry-level document camera/one per school, extended until the end of September; use the promotion code SCE12 with any online retailer)

For now, I want to give kudos to the companies above. But let’s just say that document camera companies should do much more than they are doing if they want to reach schools. Document camera companies should offer regular and creative contests, grants, and freebies to struggling schools. Once a school or department gets a successful implementation going, it is certain to spread. Sometimes they just need to prime the pump. 


Monday, August 20, 2012

The Latency Test


Are you trying to determine which document camera is right for your classroom? Then I suggest you try the latency test on several competing document cameras the next time you are in a conference exhibit hall. 
To conduct a latency test, just place your hand on the left side of the document camera’s display area. Your hand should now be clearly visible on either the demonstration projector or monitor screen. Next, pick up your hand about ¼ inch from the surface and quickly move your hand to the right side of the document camera’s display zone. Repeat this action several times. How blurry is the resulting display? Can the capture or frame rate of the document camera keep up? Is the resulting visual experience an unseemly blur? Or does the image abruptly and uncomfortably time shift into focus, a split second or two after your hand stops moving?

A document with low latency is important in classrooms. Here’s why. Blurred images and refocusing waste instructional time. Instructional demonstrations of brush strokes, cutting and folding techniques, micro-images, or food preparation require sharp clarity, so blurring is quite counter-productive. Abrupt images can cause visual upset. Constant rapid movement of hands or materials in a high latency environment can create visually induced motion sickness (just like grandpa’s old home videos). You see, latency matters. And you want low latency. It’s sometimes easy to get bamboozled by a cute low-cost document camera, only to pay the piper when it won’t perform quite the way you want it to in the classroom setting. So before you buy, conduct the latency test.

Warning: wireless document cameras provide a slower frame rate than cable-connected document cameras, which is expected. What you lose in frame rate, you gain in flexibility for positioning—so don’t be overly alarmed. A wireless document camera is still a great tool for your class.