I have found that students are not so great at reading instructions. In fact, several students missed out on a Merit achievement because they failed to read instructions fully.
I therefore devised the following exercise for two classes to complete (slightly different) as a means of creating understanding by studenst as to why instructions should be read properly.
Over two classes, six students out of 43 made a paper dart. Not conclusive, contrived, yes a trick, but it was helpful in reminding students to read the instructions regarding what is to be handed in – Fully, and Before handing in.