Abstract: In a recording and evaluating instrument and method for teacher evaluation, observation and the recording of classroom activities is prompted by a display device controlled by an interval timer, the timing interval of which is preselected by the observer. The observer depresses a key of a keyboard corresponding to the observed activity. A computer receives the observer's keyboard entry, and supplies the information to a control circuit which controls the operation of a stylus mechanism and a paper advance mechanism for providing a complete and permanent record of consecutive observed activities. The computer also counts the number of observed and recorded activities, and determines the percentage of activities corresponding to each of a plurality of predetermined activity categories. At the end of the period of evaluation, the number of observed and recorded activities and the percentages in each category are displayed by a numeric display device.