This executive summary of the multiyear Beginning Teacher Evaluation Study (BTES) focuses principally on the findings of Phase III-B of this research program on teaching effectiveness. One outcome of the BTES study was a concept that makes it possible to measure individual student learning by noting observable variables of student behavior in the classroom. Academic Learning Time (ALT), as the concept is called, is defined as the amount of time a student spends attending to academic tasks while also performing with a high success rate. The more ALT a student accumulates, the more he or she can be assumed to be learning. The study also revealed five general interrelated components of effective teaching: diagnosis, prescription, presentation, monitoring, and feedback. Teachers who pay attention to all these factors tend to have students who accumulate high rates of ALT. Two other variables that are correlated with effective teaching emerged from the study. One was academic orientation, or the extent to which the teacher emphasized, valued, and worked toward cognitive achievement. The other was orientation toward affect, or the extent to which the teacher was aware of, acknowledged, and valued student feelings. (Author/JM)