my recent visit for Campus Interview

last week I went to one of the prestigious engineering college (in UP) for selecting few engineers for my company. The response was really great, 160+ people appeared for written test and finally 42 could clear the round 1.
During the interview session, I felt that the student's knowledge base is not upto mark (which we as a company expects). They have the bookish knowledge but not practical aspects of using the same theorm/logic. All were speaking the same answers, seems like there is a strong need of teaching them what exactly we as a company wants in them. what to speak, what not to speak, what areas to focus and what areas to simply ignore in calling out in interviews. what should be the body language etc...we could finally select only 5 candidates from the 165 odd batch...
Had they been trained in campus interviews training, they could have got good number of offers.