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Your assumptions are your windows on the world. Scrub them off every once in a while, or the light won't come in.

Isaac Asimov 

Laatst aangepast op dinsdag, 24 mei 2011 20:24  

Whether you think that you can, or that you can't, you are usually right.

Henry Ford

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every system perfectly designed get results william edwards deming

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ISD From The Ground Up
A No-Nonsense Approach to Instructional Design
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