Effective teaching practices, including the ability to make data-based decisions, are necessary to close achievement gaps. The purpose of this study was to investigate the effects of a collaborative, data-based decision making (DBDM) intervention on the quality of preservice teachers' DBDM. Participants were 45 preservice general educators…

This paper reports on a controlled experiment on the effects of three types of reflection triggers in an online course. Fifty-four volunteers, distributed in five groups, used these structured opportunities for reflection during learning. Results show that reflection triggers were extensively employed by the test persons and were perceived as…

A number of potential threats to internal validity in true experiments are discussed. Programmatic research efforts proceeding from established correlational findings to experiments employing random assignment are described and used as referents in discussions of validity considerations. The collection of observational data is recommended for use…