Another trick I know they use is the obscure question that gives them information without you knowing it.
eg How far was it to your school ? or How did you get to school?
If you relied on the School Bus because you lived 5 miles away then your ability to join after-school clubs would be limited (and therefore not your fault); but if you only lived 1/2 a mile away and did b@@G** all then what do they surmise about you??
Also, once you've told them that you were a member of the ...eg 'Learned Society for Commsssioned Officers...' they will ask you how it was run? and How many people were on the committee? All answers tell them whether you had the ability to be a part of the 'leadership or management' without giving you the chance to boast about the position you had or dress it up to something it was not.
Hope it all goes well.
Unmissable