This book investigates the critical relationship between time allocation and student learning outcomes within the American educational system. Lorin W. Anderson compiles research from various contributors to analyze how time functions as a primary variable in academic achievement. By examining the distinction between time spent learning and time required to learn, the text provides a framework for understanding how temporal structures like Carnegie Units and credit hours influence institutional efficacy.

Experts recognize this work as a foundational text for understanding the historical and structural role of time in educational policy. Readers frequently note the academic density of the prose, which serves as a comprehensive resource for those studying the mechanics of school learning.