This document records a study made on the amount of time students spend on academic learning. Data were collected in two different ways: (1) Teachers kept logs of the content of instruction and the amount of time spent in different content areas. Records of individual students were kept throughout the year, first on a daily basis and later on a weekly basis. These logs provided a detailed record of the time allocated to different skill areas. (2) Observers recorded the amount of time students spent actually engaged in learning. Engaged or active learning time is that subset of the allocated time when a student appears to be attending to the learning task. Teacher logs were collected at two grade levels, the second and the fifth, and in two subjects, reading and mathematics. A comparison was made between time allocations and use and student academic achievement. The conclusion was reached that monitoring the use of time in the classroom is an important factor teaching effectiveness. (JD)