By the time they get to high school, many students don't bother with the questions anymore even though they are ready for the answers. Many are apathetic. Others want to follow a leader and are intimidated by aura of authority that a teacher has. Some will assume that the teacher is ignorant and foolish and is best ignored.
If you are lucky, you will have a high school student who still has the questions. She sees through your bravado and challenges you. She demands the truth. There is nothing more exciting than when this energy enters a class. When those real questions are thrown into the air, there is a joy of learning as each side argues, brings proofs and defends opinions with words and reason. Truth becomes the focus, and Torah emerges.
Somehow, these students are often maligned because they challenge the authority of the teacher. How short sighted. In life, our students will need to be able to weed out the charismatic charlatan from the truly inspiring. They need to think critically about an idea before buying into it. The Ramban, Rashi, the Rambam all had that respect for their students. They prove their points using pesukim, maamarei chazal and logic. Yes, there is the mesorah and yes I am their teacher. But, I must establish unequivocably that I have earned that title and place in the chain of Torah transmission.
A sense of truth should be celebrated. It also must be encouraged and developed. Students can learn that any idea should have a basis and can be substantiated. They can learn that they are not being asked to believe based on a relationship with a teacher but because of the strength of the argument.. They also must learn that they are held accountable for their own opinions and beliefs. They need to know that their belief systems can't be constructed based on a whim but need a firm foundation to be true.
I can relax. Hashem and His Torah are strong enough and secure enough to deal with the probing of an adolescent. I just need to relax and enjoy the next generation's discovery of that power.