The Purdue Mechanics Freeform Classroom, introduced by Charles Krousgrill, implements a set of changes in the early Mechanical Engineering classes to reduce "freshman flunk-outs". Especially in Purdue Engineering programs, there are many classes with large numbers of students (80+) in their freshman and sophomore year. Because of these class sizes, getting the personal attention many freshmen (and some sophomores) need is difficult -- adding the interactive…