Haha. Indeed...

You can still make a positive impact, it's just very diluted. You just hope that something you taught will stick with them in the future. But it's really mostly on the students themselves and they get what they put into it.

There are also every year a handful of students with genuine curiosity and talent. With these students you can make a much bigger impact by offering them opportunities and experiences that they wouldn't be able to get outside of a college setting.