Major publishers in higher education have already been collecting data from millions of students who use their digital materials. But CourseSmart goes further by individually packaging for each professor information on all the students in a class — a bold effort that is already beginning to affect how teachers present material and how students respond to it, even as critics question how well it measures learning. The plan is to introduce the program broadly this fall.

Adrian Guardia, a Texas A&M instructor in management, took notice the other day of a student who was apparently doing well. His quiz grades were solid, and so was what CourseSmart calls his “engagement index.” But Mr. Guardia also saw something else: that the student had opened his textbook only once.

“It was one of those aha moments,” said Mr. Guardia, who is tracking 70 students in three classes. “Are you really learning if you only open the book the night before the test? I knew I had to reach out to him to discuss his studying habits.”

Students do not see their engagement indexes unless a professor shows them, but they know the books are watching them. For a few, merely hearing the number is a shock. Charles Tejeda got a C on the last quiz, but the real revelation that he is struggling was a low CourseSmart index.

“They caught me,” said Mr. Tejeda, 43. He has two jobs and three children, and can study only late at night. “Maybe I need to focus more,” he said.