This interesting article by Simon Richardson is about his experience of using Demand High as an Experimental Practice on Module 2 of the Cambridge Delta. It might inspire you if you are considering which Experimental Practice to try.
Simon has successfully passed his Delta (including the Demand High Experimental Practice!) and is now an Academic Manager in Oxford.
Download Word File: DH for DELTA
Also have a look at this article on DH possibilities for Experimental Practice in Delta: Could Demand High be your Experimental Practice?
Demand High ELT 
Further to the above, you can find my essay / data gathering questionnaires for the DH DELTA here: http://simonrichardsonenglish.wordpress.com/teaching-portfolio/
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