Hi Lisa: Guest speakers bring a dimension to the students that is just about impossible to duplicate in the classroom or lab. Same is true for field trips. The thing that makes these activities special is that information shared provides unique insight into the world or profession the students are training for. This can be magically motivating and inspiring for many students, some who may only have vague ideas about what to expect. Also, it's a different "voice", and many times the guest will validate information the teacher has previously discussed. That contributes to more trust and respect. Regards, Barry