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I backed a Kickstarter project for a new smartphone app for teachers called 'Quick Key': "Quick Key turns your phone into an optical scanner to grade quizzes, tests, and surveys on paper, up to 30 questions long. Then, Quick Key allows you to run analytics right on your phone, then upload the data to your electronic grade book."  

I designed a laser-cut stand for the iPhone 4/4S/5 that holds the phone at the optimal scan height of 9 inches, and leaves space underneath for some kind of workflow (side to side, pile to pile, etc) for when you need to scan a large number of quizzes at once.  I made it at TechShop using the Epilog 60-watt Laser Cutter/Engraver and the Formech FLB500 heat strip bender.  

www.techshop.ws

http://www.kickstarter.com/projects/quickkey/quick-key-the-smartphone-app-that-works-for-teache

www.power2teach.com

Step 1: Laser cut the stand

Picture of Laser cut the stand
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I used 3 mm clear acrylic to laser cut my stand.  Laser file was designed in CorelDraw.