Let them use the concordance. We've found that older children and youth tend to select an easier level than they should. After some experimentation, you'll get a pretty good sense of which age group and which kids should be using the different levels. Encourage groups of two or three to select a level of difficulty appropriate for their skills. The beginner level provides only two possible answers.
Higher levels add to the number of possible answers and select from a wider group of questions.
Kids will ask for help. Help them to deduce the answer, look it up, or read the question again. Train your teachers to help their students discover and think. Not only does this improve their knowledge and thinking skills related to the Bible, but their self-esteem as well. Train your teachers to view questions and answers as points of possible discussion.