Since the late 1970's when students in the Introductory Soil Science course at Purdue University first began to use computers, technology has played a major role in helping students learn about soils. Today, in addition to computers and the Internet, students in both the Introductory Soil Science and the Soil Fertility courses have a new instructional technology tool for the course lectures. All students enrolled in these courses have a personal response device (CPS) that allows them to respond to the instructor's questions individually. When the instructor poses a question in lecture, each student answers using his or her “clicker”. Immediately, a graph is projected that tells the class and instructor how well the students understood the concept. Teaching now becomes focused on helping those students who did not understand the concept rather than focusing only on the students who gave the correct answer. Over 80% of the students responded that the response devices improved learning and over 75% indicated they were more engaged during lecture. Cost of the individual device is $20 and it can be used in any other course that uses this system.