This report describes a microcomputer system which collects data from students in classrooms on a daily basis and is then used to evaluate concept achievement and attitude changes through a time series analysis. Two pilot studies in two junior high schools in Ohio are detailed, where eighth grade students' progress in an earth science study unit on the Great Lakes was monitored using the study management program. Data from the first study were incomplete but did permit some modification of the program before it was tried again. Data for the second study show a baseline pattern of decreasing performance which has been found in other studies using this data collection system. It appears that students begin to resent having to respond to questions on information that they have not been taught; they tire of trying to answer the questions correctly; and their performance falls. However, in the "intervention" phase of data collection, when the unit is being used, the positive influence of the unit on the students' knowledge is indicated by a rising curve. It also appears that student performance remains high following the end of the unit. The text is supplemented with three figures and an eight-item bibliography is provided. (EW)