With a 12:1 student-to-faculty ratio and an average class size of 31 students, there is ample opportunity to interact with professors, but Purdue is a place where students are expected to speak up. Faculty office hours, dinner with faculty fellows, conversation with professors after class - these are all ways students step up to pilot their individual academic experience.
In addition, many professors are actively "flipping the course" - turning what had been large, lecture-style courses into smaller, more interactive class sessions. Through a program called IMPACT (Instruction Matters: Purdue Academic Course Transformation), students review lectures online and come to class ready to participate.
Faculty connections can lead to undergraduate research opportunities, internships, professional connections, personal insight for graduate study, not to mention a better understanding of coursework.