We have the students stick each other for a 'skill check off.'
During simulation I use a 4x6 index card that I have the blood sugar reading pre-written for the scenario out for the student.
The student will go through the correct steps of doing the finger stick on the simulator; then they will go to a predetermined area (usually where the glucometer is located) where I have the 4x6 index card placed face down and they turn it over to get their results.
It's not the best method but it is a method that works for me.
Hope this helps.